Big Fat Peanut Butter Oatmeal Chocolate Chip Cookies

Peanut butter and chocolate lovers rejoice! I’ve combined at least 3 delicious cookies into 1 mouthwatering recipe with my big fat peanut butter oatmeal chocolate chip cookies. Consider yourself warned: these cookies are exploding with flavor, unapologetically thick, and hopelessly irresistible. They’re guaranteed to satisfy almost every cookie craving.

peanut butter oatmeal chocolate chip cookie

A cookie to end all cookies, these big fat peanut butter oatmeal chocolate chip cookies are a mouthful. I was inspired to try these decadent treats after seeing the cover of my cookbook, Sally’s Cookie Addiction, for the first time. The glorious monster cookies gracing the book cover are loaded with M&Ms and can be found in Chapter 2.

This recipe, however, skips those rainbow candies and focuses instead on a flavor relationship like no other. Chocolate chips and peanut butter. It’s a match made in cookie heaven! In this recipe, we’re combining that perfect pairing with textured oats to achieve the thickest, richest, and most satisfying cookie.

peanut butter oatmeal chocolate chip cookies on a cooling rack

Tell Me About these Big Fat Peanut Butter Oatmeal Chocolate Chip Cookies

  • Texture: Loaded with so many delicious add-ins, these cookies have chewy edges, soft centers, and are unbelievably thick. (I’m always shocked by how thick they turn out.) 
  • Flavor: Ordinary chocolate chip cookies are buttery sweet on their own, but the peanut butter-chocolate pairing here brings a delicious decadence to these cookies. 
  • Ease: Simple to make, the dough comes together in just minutes using a few staple pantry add-ins like old-fashioned oats and peanut butter. Make them for same-day snacking or prepare them ahead of a special occasion (see Note).
  • Time: This dough can be prepped and chilled in under an hour. 20 minutes in the refrigerator (the same amount of time we chill dough for brownie cookies) helps the oats soak up some moisture and prevents the cookie from overspreading. 

Recipe Testing: What Works & What Doesn’t

  1. The weight of peanut butter. This cookie dough is adapted from my oatmeal chocolate chip cookies. The addition of peanut butter here, however, can weigh down the dough. To counter this, I add baking powder for lift
  2. A spreading solution. When testing the recipe, I found the cookies weren’t spreading enough. I decided to swap the quantities of granulated sugar and brown sugar. Granulated sugar – dry and thin – helps increase cookie spread. Brown sugar–moist and thick–keeps cookies compact. Increasing the granulated sugar makes all the difference in this dough for the perfect spread. You won’t even miss that extra brown sugar flavor because the peanut butter is our front-runner. 
  3. Fewer oats + more chocolate. When testing, I originally had a higher quantity of oats in the cookies. I decided to reduce that amount to make room for more chocolate chips. Can you blame me? 

peanut butter oatmeal chocolate chip cookie broken in half and stacked on a cooling rack

Choosing the Right Ingredients: Best Peanut Butter to Use

Peanut butter.  Though natural style peanut butter is my #1 choice for eating and snacking, I always recommend using non-natural peanut butter for baking. (You might remember reading this from my traditional peanut butter cookies recipe.) Cookies made with natural peanut butter are crumbly with a sandy texture. For baking, I recommend using Jif or Skippy. You can use creamy or crunchy, but I prefer creamy peanut butter as crunchy can make the cookies taste a little dry. You’ll need 1 cup of peanut butter for this recipe.

Room temperature butter. Like my basic soft chocolate chip cookies, the base of today’s oatmeal cookie recipe is creamed room temperature butter, granulated sugar, and brown sugar. You can’t cream butter and sugar together if the butter is too warm or too cold. (It usually spells disaster for your cookies!) Room temperature butter is about 65°F (18°C). It’s cool and slightly firm to touch, not warm or slippery. I recommend placing your butter on the counter for 1 hour prior to beginning the recipe to achieve ideal “room temperature” butter. If you don’t have an hour, here is my trick to soften butter quickly. You need 1 cup of butter for this cookie dough.

Peanut Butter Oatmeal Chocolate Chip Cookie Dough

After you prepare the peanut butter oatmeal chocolate chip cookies dough, chill it for 20 minutes in the refrigerator. After chilling, it’s time to scoop the dough and bake the cookies. Each cookie uses 2 Tablespoons of dough. Arrange the cookie dough balls 3 inches apart on your baking sheet. These cookies are large, so I use a medium cookie scoop and overflow it with dough (since the medium only holds 1.5 Tablespoons.)

Peanut butter oatmeal chocolate chip cookie dough

peanut butter oatmeal chocolate chip cookie dough on baking sheet before baking

peanut butter oatmeal chocolate chip cookies on a baking sheet after baking

peanut butter oatmeal chocolate chip cookies on a baking sheet after baking

More Quick Cookie Recipes

clock clock icon cutlery cutlery icon flag flag icon folder folder icon instagram instagram icon pinterest pinterest icon facebook facebook icon print print icon squares squares icon heart heart icon heart solid heart solid icon
peanut butter oatmeal chocolate chip cookie

Big Fat Peanut Butter Oatmeal Chocolate Chip Cookies

  • Author: Sally
  • Prep Time: 40 minutes
  • Cook Time: 15 minutes
  • Total Time: 1 hour, 10 minutes
  • Yield: 32 cookies
  • Category: Cookies
  • Method: Baking
  • Cuisine: American


Big fat peanut butter oatmeal chocolate chip cookies are easy, thick, and exploding with peanut butter, oats, and chocolate chips to satisfy your cookie cravings.


  • 1 and 1/2 cups (188g) all-purpose flour (spoon & leveled)
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • 1 teaspoon salt
  • 1 cup (2 sticks; 235g) unsalted butter, softened to room temperature
  • 1 cup (200g) granulated sugar
  • 1/2 cup (100g) packed light or dark brown sugar
  • 2 large eggs, at room temperature
  • 1 cup (260g) creamy peanut butter
  • 2 teaspoons pure vanilla extract
  • 2 cups (180g) old-fashioned whole rolled oats
  • 2 and 1/2 cups (450g) semi-sweet chocolate chips, plus more for topping if desired


  1. Whisk the flour, baking powder, baking soda, and salt together in a medium bowl. Set aside.
  2. In a large bowl using a hand mixer or a stand mixer fitted with a paddle attachment, beat the butter on medium-high speed until smooth, about 1 minute. Add the granulated sugar and brown sugar and beat on medium-high speed until creamed, about 2 minutes. Add the eggs, peanut butter, and vanilla and beat on high speed until combined, about 1 minute. Scrape down the sides and up the bottom of the bowl and beat again as needed to combine.
  3. Add the dry ingredients to the wet ingredients and mix on low until combined. With the mixer running on low speed, add the oats. Once combined, beat in the chocolate chips. Dough will be thick and sticky. Cover and chill the dough for at least 20 minutes in the refrigerator (and up to 4 days). If chilling for longer than 1 hour, allow to sit at room temperature for at least 30 minutes before rolling and baking because the dough will be quite hard.
  4. Preheat oven to 350°F (177°C). Line baking sheets with parchment paper or silicone baking mats. Set aside.
  5. Scoop balls of dough, 2 Tablespoons of dough per cookie, and arrange 3 inches apart on the baking sheets. Bake for 12-14 minutes until lightly browned on the sides. The centers will look very soft.
  6. Remove from the oven and allow to cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely. While the cookies are still warm, I like to press a few more chocolate chips into the tops– this is only for looks!
  7. Cookies stay fresh covered at room temperature for up to 1 week.


  1. Make Ahead Instructions: You can make the cookie dough and chill it in the refrigerator for up to 4 days. Allow to come to room temperature then continue with step 4. Baked cookies freeze well for up to 3 months. Unbaked cookie dough balls freeze well for up to 3 months. Bake frozen cookie dough balls for an extra minute, no need to thaw. Click here for my tips and tricks on freezing cookie dough.
  2. Peanut Butter: Use a non-natural peanut butter like Jif creamy or Skippy creamy. I do not suggest using natural style or oily peanut butter as both produce crumbly, fragile, and sandy tasting cookies. (Try this flourless peanut butter oatmeal cookie if you want to use natural!) Crunchy peanut butter is OK, but I find the cookies taste a little dry with it.
  3. Be sure to check out my top 5 cookie baking tips AND these are my 10 must-have cookie baking tools.


  1. Omg. These are so good. Didn’t have an egg, so swapped for 1/4 c plain Greek yogurt. They were excellent!!!

  2. Delicious and perfect! The cookies turned out very light and soft but at the same time very rich in flavor. I love the texture that the oats add.

  3. These are soooooooo good! I’ve made lots of different cookie recipes and this is one of the yummiest! I added walnuts but everything else was exact to recipe!

  4. Sally Brick says:

    I wondered if there was a recipe for my favorite cookies all smooshed together, and here it is! Amazing flavor and texture. Unlike you, I prefer less choc chips and more oatmeal, so I added just 1 C chips and upped the oatmeal (didn’t measure past what is called for here, just added until it looked right) and absolute delicious! A new family favorite. Thank you for having a recipe for just what I wanted!

  5. Sarah Clifton says:

    Do you think I could swap Sunflower Butter for the peanut butter?

    1. Trina @ Sally's Baking Addiction says:

      Hi Sarah! We haven’t tested it, but don’t see why it may be an issue as long as it isn’t oily. Let us know if you give it a try!

    2. That sounds delicious. Heads up if you’ve never baked sunflower butter before: they’ll come out green!

  6. I don’t quite have a full 2 cups of oats-maybe 1.5? is there a substitute or would they be okay w/ less oats? I could also half the recipe-just wondering, thanks!

    1. Trina @ Sally's Baking Addiction says:

      Hi Liz! If you don’t have enough oats for a full batch, we would halve the recipe. Hope you love them!

  7. This is my all time favorite cookie recipe, I have made them at least 6 times, always turn out fabulous!

  8. These cookies are absolutely delicious! They have the perfect texture- crispy on the outside and soft on the inside. I love how thick they were and the flavour combination is on point.

  9. Goodness, I think these may be the best cookies I have ever had! I just found your site, really appreciate the gram measurements for accuracy.

    The only liberty I took was after measuring the oatmeal I used a food processor to grind it a bit finer. Not pulverized to a powder, just slightly smaller than out of the package. Gives a really nice texture.

    And a happy accident I stumbled on is I had 1 bag of chocolate chunks and 1 bag of mini chips. Not enough of either to use only one kind but using both together gave a magnificent chocolate distribution.

  10. I love this recipe! I add raisins, cranberries and walnuts in addition to the ingredients listed, cinnamon too. Thank you so much for an awesome recipe!


  12. So does this recipe still work if I halve everything? I only have 1 stick of butter, darn!!

    1. Lexi @ Sally's Baking Addiction says:

      Hi Micaella! Absolutely — simply halve all the ingredients. Enjoy!

  13. I don’t have rolled oats only quick oats, would that work?

    1. Trina @ Sally's Baking Addiction says:

      Hi Zena, quick oats are more powdery and dry out the cookies. We recommend sticking with whole oats.

      1. I did use quick oats to make this recipe my first time because it was all I had and I could not wait to try the recipe. They still turned out great. I would do it again without hesitation.

  14. Thanks so much for this delicious recipe! I ended up using only 1.5 cups of chocolate (1 cup semisweet chips + .5 cup chopped Hershey’s bar) and it still turned out great! I got 34 cookies out of this recipe. By the way, your pictures are beautiful and you are my go-to baking blog! Keep up the amazing work 🙂

    1. Trina @ Sally's Baking Addiction says:

      You’re so sweet, Naomi! Thank you so much for making our recipes.

  15. Holy guacamole. What a delicious and versatile recipe! I used 1 cup of whipped Earth Balance and enjoy life mini semi sweet chips to omit any dairy, used a mixture of erythritol and coconut sugar in place of the regular sugar and brown sugar, added a tablespoon of pure maple syrup and tablespoon of ground flax seed, and did 1 cup all purpose and 1/2 cup whole wheat flour. Yes, a lot of adjustments but very very good.

  16. The best cookies I’ve ever made. I used to double the recipe, but that’s not enough anymore. Now I quadruple it.

  17. I’d like to put peanut butter chips in this recipe, but to not make the PB overwhelming would want reduce the PB in the recipe. If I half it, any suggestions to adjust the recipe?

    1. Trina @ Sally's Baking Addiction says:

      Hi Julie! It would take some recipe testing to reduce the peanut butter in this recipe. Let us know what you try! You could also use this recipe for Chocolate Chip Oatmeal Cookies with peanut butter chips instead of chocolate chips.

  18. These were just fabulous! I bake a lot of cookies, and am particular about the quality. This recipe is the bomb! Easy, and just perfectly, crispy, chewy and complex in flavor. Perfect!

  19. I used Justin’s Honey Peanut Butter for this recipe and it was amazing!! Thank you!!

  20. This is the perfect recipe for me – all the right ingredients and they came out beautifully.

    Have you ever made them as a bar? If so, how thick do you fill the dish and any changes to bake time?

    Thanks for sharing…

    1. Trina @ Sally's Baking Addiction says:

      Hi Ted, you can definitely try these in a 9×13 inch pan to make cookie bars. We’re unsure of the exact bake time needed, but you can follow the baking time and temperature for our Chocolate Chip Cookie Bars as a guide. Enjoy!

1 10 11 12

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe rating

This site uses Akismet to reduce spam. Learn how your comment data is processed.

With kitchen-tested quality recipes and step-by-step tutorials, my goal is to give you the confidence to bake and cook from scratch.

Sally's signature

Recipes You’ll Love



Join the community on the 1st of every month as we tackle a new challenge recipe. Review Sally's Baking Challenge FAQ page if you have any questions.

View More

A tradition since 2013, every December we countdown to Christmas with 10 new cookie recipes in a row!

View More

The first week of every November is all about Thanksgiving Pies.

View More

My Cookbooks

Sally's Cookbooks

About Sally

Welcome to my Kitchen!

I’m Sally, a cookbook author, photographer, and blogger. My goal is to give you the confidence and knowledge to cook and bake from scratch while providing quality recipes and plenty of pictures. Grab a cookie, take a seat, and have fun exploring! more about Sally