Healthy Berry Streusel Bars

These easy healthy berry streusel bars combine 2 layers of almond oat streusel and 1 thick layer of berry filling. They’re made with wholesome ingredients like oats, almond butter, applesauce, berries, and maple syrup. By skipping the butter, egg, and other dairy ingredients, these dessert bars are vegan. If using certified gluten-free oats, they’re gluten free as well! Use your favorite berries like blueberries, raspberries, and strawberries.

stack of healthy berry streusel oat bars

I originally published this recipe in 2014 and have since added new photos and more success tips. I also made 2 slight adjustments to the recipe: the bars are now vegan and by pulsing the oats into a finer cut, they hold their shape MUCH better.


This dessert recipe has been a consistent favorite for many years. They’re flavored with almond, cinnamon, maple syrup, and have plenty of berries in each bite.

Here Why You’ll Love Them

  • 2 layers of cinnamon almond oat streusel
  • Thick and juicy berry filling
  • Only a handful of easy healthy ingredients
  • Naturally vegan, but you can use an egg if needed
  • No butter, white flour, or refined sugar
  • Gluten free if using certified GF oats

Plus, they freeze easily AND they’re adult and toddler approved. They remind me of these blueberry banana breakfast cookies, which are equally easy and healthful. (Another favorite!)

One reader, Angie, commented:Oh wow! These are AMAZING! Every time I try a new recipe I think it’s my favorite, but THIS one is now my favorite. I used fresh picked blueberries. What an incredible bar that’s not too sweet and packed with flavor. Thanks for another winner recipe! ★★★★★”

healthy berry oat streusel bars

Two Parts to Healthy Berry Streusel Bars

  1. Berry Filling: This is a thick and juicy berry filling—it’s essentially a super chunky homemade jam. You need mixed berries, cornstarch, water, pure maple syrup, and 1 Tablespoon of coconut sugar. If you don’t have coconut sugar, you can sub in white granulated or brown sugar. You need a dry sugar to help soak up some moisture. The cornstarch and water mixture thickens the filling while the pure maple syrup is an unrefined sweetener.
  2. Crust & Streusel: What I find most convenient (and I know you will too) is that the crust and streusel are made from the same mixture. Use most of it for the crust, then sprinkle the rest on top of the berry filling before baking. For this mixture you need: oats, cinnamon, almond butter (homemade almond butter is fantastic here), pure maple syrup, applesauce, and coconut oil. So the bars remain compact and hold their shape, pulse the oats in a food processor or blender first. I know what you’re thinking: can’t I just use oat flour? Unfortunately, no—it’s too fine! You can use quick oats, though.

Overview & Photos: How to Make Healthy Berry Streusel Bars

Make the berry filling on the stove. It only takes a few minutes. It needs to cool completely before using, so you can make it ahead of time.

healthy mixed berry bars filling

Now let’s make the crust/streusel mixture. Pulsing the oats breaks them up, which helps guarantee the bars will hold their shape. (Very necessary with a juicy filling.) I actually started doing this with my peanut butter trail mix bars and it made all the difference—tight, compact bars!

two photos of almond butter oat streusel mixture

Mix in the rest of the crust/streusel ingredients:

almond butter oat streusel mixture

Press most of it into a lined 9-inch square baking pan. Spread cooled berry filling on top. Add some sliced almonds to the rest of the crust/streusel, then sprinkle on top.

Tip: For neat squares, it’s best to let these bars cool completely before slicing.

healthy berry streusel bars before baking

Substitution Ideas

Here are some ingredient substitutions I’ve tested:

  • Oats: Use quick oats or whole oats. If using whole, you’ll need to pulse them. If using quick oats, you can skip the pulsing. I will note, however, the bars hold their shape much better if you pulse the oats first, regardless if you’re using whole or quick oats.
  • Nut Butter: Instead of almond butter, try peanut butter, cashew butter, or sunflower seed butter for a naturally nut-free option.
  • Applesauce: Homemade or store bought applesauce works. Instead of applesauce, try mashed banana or 1 egg. The bars would no longer be vegan if using an egg.
  • Maple Syrup: You can use honey instead of maple syrup, keeping in mind the bars would no longer be vegan.
  • Coconut Oil: You can use melted unsalted or salted butter instead. Just like when you make no-bake chocolate fudge oat bars, you need a fat that’s solid at room temperature, so do not replace with an oil that is liquid at room temperature.
  • Berry Filling: You need 2 cups of fresh or frozen berries. You can use a blend of mixed berries or only blueberries, blackberries, or even chopped cherries.
healthy berry streusel bars

Are These Healthy?

I say this a lot with the lightened-up recipes I publish, but “healthy” is a relative term. In my eyes, these are perfectly healthy dessert bars. They’re made with whole foods like almond butter and fiber-filled oats, plus there’s no white flour or refined sugar. However, they may be too sugary for someone who needs to watch their sugar intake and they’re obviously not ideal for anyone allergic to nuts.

When it comes to labeling recipes as healthy, use the best judgment for YOU.

  • I’m unsure of the nutritional information for these, but feel free to calculate it yourself using an online calculator and the exact products/brands you use.

These bars are among great company as one of my favorite healthy dessert recipes. Browse more of my healthier recipes, like peanut butter oatmeal bars, bran muffins, and no-bake Greek yogurt fruit tart.

And for additional gluten free sweet treats, see my complete list of 40 favorite gluten free dessert recipes.

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healthy berry streusel oat bars

Healthy Berry Streusel Bars

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.6 from 18 reviews
  • Author: Sally
  • Prep Time: 1 hour (includes berries cooling)
  • Cook Time: 30 minutes
  • Total Time: 3 hours (includes cooling)
  • Yield: 12
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
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Description

These easy healthy berry streusel bars combine two layers of almond oat streusel and one thick layer of berry filling. These dessert bars are vegan. If using certified gluten-free oats, they’re gluten free as well!


Ingredients

Berry Filling

  • 1 and 1/2 Tablespoons (12g) cornstarch
  • 1 and 1/2 Tablespoons (23ml) water
  • 2 cups (about 300g) fresh or frozen mixed berries (do not thaw & see note)
  • 1/4 cup (60ml) pure maple syrup
  • 1 Tablespoon (11g) coconut sugar, brown sugar, or granulated sugar

Crust + Streusel

  • 2 and 1/2 cups (213g) old-fashioned whole rolled oats or quick oats
  • 1/2 teaspoon ground cinnamon
  • 1 cup (255g) almond butter
  • 1/4 cup (60ml) pure maple syrup
  • 1/4 cup (60g) unsweetened applesauce
  • 1/4 cup (56g) coconut oil, melted (or use melted butter)
  • for topping: 1/2 cup (64g) sliced or chopped almonds and 1 extra Tablespoon oats


Instructions

  1. Berry Filling: Whisk the cornstarch and water together until all the cornstarch has dissolved. (I just use a fork to mix—very easy.) Place the cornstarch mixture, berries, maple syrup, and coconut sugar in a medium saucepan over medium heat. Using a rubber spatula, stir the mixture as it cooks. Smash some of the berries against the bottom/sides of the pot as you stir, gently breaking them up. Bring to a simmer and allow to simmer for 2 minutes, stirring constantly. After 2 minutes, remove pan from the heat and allow to cool completely. The mixture will thicken as it cools. To speed up the cooling process, feel free to cover and refrigerate it after it slightly cools for at least 30 minutes at room temperature. I recommend making the berry filling in advance so it can cool completely. Berry filling can be cold or room temperature when you assemble the bars—you just don’t want it hot or warm.
  2. Preheat oven to 350°F (177°C). Line the bottom and sides of an 8-inch or 9-inch square baking pan with parchment paper, leaving an overhang on the sides to lift the bars out (makes cutting easier!). Set aside.
  3. Make the crust/streusel: Pulse the oats in a food processor or blender until they’re slightly broken up. (For whole oats, about 10 pulses. For quick oats, about 5-6 pulses.) Pour into a bowl and stir in the cinnamon, almond butter, maple syrup, applesauce, and melted coconut oil. Mixture will be thick and wet.
  4. Using the back of a flat spatula or a spoon, press about 3/4 of the crust/streusel mixture tightly and firmly down into the pan. Make sure it’s flat and very compact, which helps guarantee the bars will hold their shape. Spread cooled berry filling evenly on top.
  5. For Topping: Mix the sliced almonds into the remaining crust/streusel mixture. Sprinkle all over the top of the berry filling. Sprinkle 1 Tablespoon of oats evenly on top. (Helps soak up some moisture.)
  6. Bake for 27-31 minutes or until the topping is lightly browned. Remove from the oven and place baking pan on a cooling rack. Allow bars to cool completely. After about 1 hour cooling at room temperature, you can place the pan in the refrigerator to help speed the cooling up. Lift the cooled bars out using the parchment paper overhang on the sides. Cut into squares.
  7. Cover and store leftover bars in the refrigerator for up to 1 week.

Notes

  1. Freezing Instructions: Layer the cooled and cut bars between sheets of parchment in a freezer-friendly bag or container. Freeze for up to 3 months. Thaw in the refrigerator or at room temperature.
  2. Special Tools (affiliate links): Glass Mixing Bowls | Medium Saucepan | Silicone Spatula | 8-inch Square Baking Pan or 9-inch Square Baking Pan | Food Processor or Blender
  3. Fruits: You need 2 cups of fresh or frozen berries. I typically use 1 cup of blueberries, 1/2 cup of chopped strawberries, and 1/2 cup of raspberries. You can use a blend of mixed berries or only blueberries, blackberries, or even chopped cherries. I haven’t tested this recipe with other fruits, but let me know if you try it.
  4. Nut Butter: I recommend using creamy almond butter, but you can use crunchy instead if needed. You can also replace with peanut butter (natural or non-natural), cashew butter, or another nut butter of your choice. Sunflower seed butter is a great nut-free alternative.
  5. Ingredient Questions: I’ve made these bars countless times with all sort of ingredients substitutions. See all successful ingredient substitutions in the blog post above.
  6. Topping: I mix sliced almonds into the topping, but you can use any chopped nut (or sunflower seeds/pepitas) instead. I don’t recommend skipping this addition because it helps bulk up the topping. If you don’t have any nuts, add 1/4 cup (20g) of whole or quick oats to the topping mixture in step 5. No need to pulse them first and no need for that extra 1 Tablespoon of oats.
almond butter berry streusel bars
sally mckenney headshot purple shirt.
About the Author

Sally McKenney

Sally McKenney is a baker, food photographer, and New York Times best-selling author. Her kitchen-tested recipes and step-by-step tutorials have given millions of readers the knowledge and confidence to bake from scratch. Sally’s work has been featured on TODAY, Good Morning America, Taste of Home, People, and more.

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Reader Comments and Reviews

  1. Julissa says:
    May 7, 2021

    AMAZING i add coconut to the streusel and skip the maple syrup in the berry filling since I use really sweet ripe berries. the bars taste so incredible and naturally sweet and I LOVE having this for breakfast

    Reply
  2. Yuvthi Raghubir says:
    April 22, 2021

    Made these earlier today- Absolutely DIVINE!! Sally, I love your recipes. Everything I have made from your site always comes out absolutely delicious. Thank you!

    Reply
  3. Elissa Romano says:
    April 12, 2021

    Has anyone figured out the calorie count on one of these?

    Reply
    1. Lexi @ Sally's Baking says:
      April 12, 2021

      Hi Elissa! We don’t usually include nutrition information as it can vary between different brands of the same ingredients. Plus, many recipes have ingredient substitutions or optional ingredients listed. However, there are many handy online calculators where you can plug in and customize your exact ingredients/brands. Readers have found this one especially helpful: https://recipes.sparkpeople.com/recipe-calculator.asp

      Reply
  4. Marilyn Cepaitis says:
    March 27, 2021

    How would you make this diabetic

    Reply
  5. Grace says:
    February 22, 2021

    I bake Sally recipes on a weekly basis and love most. This one, however, was not well received in my house. They reminded me of Sally’s blueberry almond power muffins, also not well received. I think it’s the almond butter. We are not fans. Just a word of caution to those that do not like almond butter, you may not find this recipe enjoyable.

    Reply
  6. Les says:
    January 28, 2021

    Delicious! Thanks a lot for posting a vegan recipe 🙂

    Reply
  7. Melissa says:
    January 4, 2021

    I just put this in the oven and realized (when I looked at my unopened jar of applesauce) that I forgot to add it. Are my bars doomed?

    Reply
  8. Make Kay says:
    September 15, 2020

    Hey, has anybody who has made these tried these using steel cuts oats and pulsing them? I’ve got a case of GF steel cut oats in my pantry that I’m trying to work my way through after I stopped eating breakfast, so I’m always trying to figure out what I can successfully sub them into 🙂

    Reply
  9. Julie says:
    August 31, 2020

    Hi Sally – can’t wait to make these – do you think I can sub Crisco for the coconut oil? I don’t keep coconut oil on hand, but will buy it if I have to! Thank you!

    Reply
    1. Sally @ Sally's Baking says:
      August 31, 2020

      Hi Julie! I recommend using 1/4 cup of melted butter instead of crisco.

      Reply
  10. Annie says:
    August 20, 2020

    Thanks for the recipe Sally! I made these today using banana in place of applesauce, natural peanut butter in place of almond butter, and strawberries in place of mixed berries. They were good, but tasted a lot like pb and jam. 🙂 I would love to taste them made as written

    Reply
  11. Chava says:
    August 20, 2020

    Do you think sesame paste (raw tahini) would work in place of almond butter?
    Thank you for the delicious recipe

    Reply
    1. Sally @ Sally's Baking says:
      August 20, 2020

      I haven’t tested it, but I’m sure that would work!

      Reply
    2. SNL says:
      November 9, 2020

      Hiya, I have made this recipe twice now with tahini sub for almond butter. Works perfectly 🙂

      Reply
  12. Carol says:
    August 18, 2020

    Love, love that your recipe is vegan! Thank you!

    Reply
  13. Kim says:
    August 17, 2020

    I made this recipe using blueberries and peanut butter. I wasn’t sure how the combination would turn out but it’s amazing!! I love that this recipe isn’t too sweet. Will definitely make this again!

    Reply
    1. Sally @ Sally's Baking says:
      August 20, 2020

      Sounds like a delicious combo, Kim! Thanks so much for sharing.

      Reply
  14. Jennie says:
    August 14, 2020

    Is there anything you might recommend as a substitute for applesauce? I’ve had texture problems baking with applesauce in the past; things came out a bit rubbery. Thank you, Sally!

    Reply
    1. Stephanie @ Sally's Baking says:
      August 17, 2020

      Hi Jennie, Instead of applesauce, try mashed banana or 1 egg.

      Reply
  15. Rachel says:
    August 14, 2020

    These look soo good! I’m definitely going to try these!

    Reply
    1. Susan says:
      August 15, 2020

      I just made these to take to lunch for a friend who is having difficulty chewing and one who is gluten free and dairy free. Both LOVED them (gf df friend ate 3)! I replaced the nuts in the streusel with extra oats to keep them easy to chew.

      Reply
  16. Angie says:
    August 13, 2020

    Oh wow! These are AMAZING! Every time I try a new recipe I think it’s my favorite, but THIS one is now my favorite. I used fresh picked blueberries. What an incredible bar that’s not too sweet and packed with flavor. Thanks for another winner recipe!!

    Reply
    1. Sally @ Sally's Baking says:
      August 20, 2020

      Thank you for the positive review, Angie! I’m thrilled to hear you enjoyed this recipe so much. I bet they were delicious with your fresh picked blueberries.

      Reply
  17. Iram says:
    August 13, 2020

    Sally I loved watching your bloopers video on youtube. It really made me smile, you seemed silly!! 🙂 I hope you are well and enjoying your time with your kids

    Reply
    1. Sally @ Sally's Baking says:
      August 20, 2020

      So glad you enjoyed it, Iram – there were definitely plenty of bloopers during filming! And thank you, we are certainly enjoying our time together as a new family of four. Appreciate the well wishes!

      Reply
  18. Sherry says:
    August 13, 2020

    They sound delicious what can you substitute if you can’t use any nut or seed butter? We can’t use sunflower seed butter as well. My granddaughter is highly allergic to nuts, seeds, and tree nuts. Coconut too!

    Reply
    1. Stephanie @ Sally's Baking says:
      August 13, 2020

      Hi Sherry, If she is able to have soy you can try a product called Wowbutter.

      Reply
  19. Anna says:
    August 13, 2020

    A huge thank you for posting a vegan recipe!! I have enjoyed your blog for years, but since becoming vegan a year ago I have only been able to peruse your site merely for the eye candy. I am so happy to now have a recipe of yours that I can make!

    Reply
  20. Kim says:
    August 13, 2020

    Is substituting the berry layer with a good jar of berry conserve (thick jam) a no-no? Perhaps sprinkling some fresh blueberries on the jam layer? Just thinking it might save a bit of time if in a rush!

    Reply
    1. Sally @ Sally's Baking says:
      August 13, 2020

      Hi Kim, you can definitely substitute berry preserves for the homemade berry layer. I’d say about 3/4 cup. And yes, feel free to dot fresh blueberries on top before adding the top crumble layer.

      Reply
      1. Jill M says:
        October 3, 2020

        Jam and fresh fruit is exactly how I made it , before I even read the comments. I’ve made it 3 times and it’s always excellent. Also this time I substituted unsweetened coconut for the almonds and it was great. I love all your recipes and your Swiss m b c , saved me this summer .

  21. Sally Francklyn says:
    April 21, 2020

    Can you use cashew butter instead of almond butter?

    Reply
    1. Sally @ Sally's Baking says:
      April 21, 2020

      Definitely!

      Reply
  22. Meagan says:
    September 1, 2016

    Made these last weekend! Used PB instead of AB (I’m on a budget…ha) and used half strawberries and half fresh picked blackberries. The best. I love it when a dessert doubles as breakfast the next day (well, most of them do, but at least this one was more guilt-free)!

    Om nom nom.

    Reply
  23. Amy Kowbuz says:
    November 8, 2014

    I made these the other day in a muffin pan for individually sized portions and they turned out great! Love your healthy recipes, especially the granolas! Keep em coming!

    Reply
  24. Sabah says:
    September 6, 2014

    I just made these and they were wonderful! Especially served with ice cream or custard 🙂 I’m really only commenting to say that I didn’t have almond butter on hand, so kind of completely improvised and subbed in 1/2 cup of sort of coconut butter (basically a semi-failed attempt at making it because it wasn’t entirely smooth) and 1/4 cup coconut oil, and as far as I can tell, it hasn’t done anything bad to the bars so…

    Reply
  25. Annalena says:
    September 4, 2014

    These are in the oven right now. Can’t wait to taste them, it already smells delicious!
    I had to make some adjustments as my local supermarket (in the middle of nowhere…) hasn’t got almond butter. I used chestnut purée instead and left out the maple syrup as it was already sweetened. Hope they still turn out well.
    I also made a compot out of yellow plums as those are in season here right now.
    I am so excited! 😀
    Thank you for all those lovely recipes!

    Reply
  26. Hayley says:
    July 30, 2014

    I absolutely DO bake right after coming home from vacation. We got in late last night and I woke up early this morning and made a batch of these. There aren’t many people living in this house & already more than half of the pan is gone…. 🙂

    Reply
  27. Nikki says:
    July 27, 2014

    I have no cornstarch and can’t make it to the store today. Detrimental to the outcome or can I omit it?

    Reply
    1. Sally @ Sally's Baking says:
      July 27, 2014

      Hi Nikki – you could try flour instead to thicken the berry filling.

      Reply
  28. Rokssana says:
    July 20, 2014

    Sally these squares were a bit hit at my dinner party last night! They were so easy to whip up and they were delicious. Thank you for the recipe! I will be making these again next weekend 🙂

    Reply
  29. Anna says:
    July 16, 2014

    Ahh thanks for this recipe Sally! Made these the other day and froze most for future pre workout use 🙂 I subbed homemade date syrup (you should try!) For the maple and used half almond butter half high protein gingerbread pb. So good. Love your healthy recipes just as much as your sugary sweet ones

    Reply
    1. Sally @ Sally's Baking says:
      July 16, 2014

      I have to try homemade date syrup! That sounds delicious Anna. So happy you enjoy my healthier recipes. They’re usually my favorites.

      Reply