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I love cookies the size of a pizza! I had a big peanut butter cookie craving the other day. The kind only a pizza cookie could remedy.

However, I clearly do not need a cookie THAT big, nor do I need an entire batch of cookies lying around my apartment. My solution was to take the middle road and bake a moderately-sized pizza cookie. About the size of my head.

This cookie is giant. Completely ridiculous. Over the top. The cookie recipe is reduced from a larger dough recipe – only 2 Tablespoons of this, 2 Tablespoons of that. This recipe can easily be divided into 4 smaller peanut butter cookies, but reduce the baking time to about 9-10 minutes.

What I love most about this recipe is that you don’t even need a mixer. Everything is mixed by hand in one bowl. Raise your hand if you love an easy clean up!

one giant peanut butter Reese's Pieces cookie on a silpat baking mat
one giant peanut butter Reese's Pieces cookie with a bite taken out of it on a wood board
one giant peanut butter Reese's Pieces cookie on a wood board

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one giant peanut butter Reese's Pieces cookie on a silpat baking mat

1 Giant Reese’s Pieces Peanut Butter Cookie

  • Author: Sally
  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Total Time: 40 minutes
  • Yield: 1 giant cookie 1x
  • Category: Cookies
  • Method: Baking
  • Cuisine: American


A giant decadent, peanut butter-packed cookie for one. Also perfect for sharing.


  • 1/2 cup all-purpose flour (spoon & leveled)
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 2 Tablespoons unsalted butter, softened to room temperature
  • 2 Tablespoons granulated sugar
  • 2 Tablespoons packed brown sugar
  • 2 Tablespoons beaten egg (crack an egg, beat it, and use 2 Tbsp)
  • 1/2 teaspoon pure vanilla extract
  • 2 Tablespoons creamy peanut butter (if using natural peanut butter, use a thick no-stir variety)
  • 1/4 cup Reese’s Pieces
  • 1/4 cup semi-sweet chocolate chips


  1. Preheat oven to 350°F (177°C) degrees. Spray baking sheet with nonstick spray or line with a silicone baking mat. Set aside.
  2. In a large mixing bowl, whisk the butter and sugars until light and fluffy. Add egg and vanilla mixing until well combined. Stir in peanut butter then add flour, baking soda and salt. Fold in Reese’s Pieces and chocolate chips until combined.
  3. With a large spoon, scoop into a ball onto prepared baking sheet. The dough will be sticky. Make sure the cookie dough ball is tall and round, like the picture above. I topped the cookie dough with a few extra Reese’s Pieces before baking.
  4. Bake for 17-19 minutes, until edges are lightly browned. The center may appear undone, but it will set as the cookie cools. Let cool ON the baking sheet for 10 minutes. Enjoy!


  1. Mix-Ins: Feel free to use any mix-ins you’d like as long as they add up to no more than 1/2 cup. Nuts, chopped candy bars, white chocolate chips, etc. Get creative!
  2. Special Tools: Glass Mixing Bowls, Whisk, Silpat Baking Mat, Baking Sheet, and Cooling Rack
  3. Recipe adapted from Picky Palate.

Keywords: giant peanut butter cookie, one giant reese's pieces peanut butter cookie

Reader Questions and Reviews

  1. Wish I could send you some reese’s to enjoy Erin! Hope you make and enjoy this cookie. Try it with chocolate chips!

  2. Yum, this looks super yummy! I think this is a great idea if you have a cookie craving (me every day) and don’t want to bake up a whole batch of cookies.

  3. Looks delicious, but do you have a recipe for a full batch of cookies? I’d love to make this, but I think I’d have more use out of a full batch rather than one big one.

    1. Hi Cindy! Try my Soft-Baked Peanut Butter Cookies:

  4. I made this cookie tonight for my family and it was fantastic! Everyone loved it! It was perfect for sharing. = ) Love your blog…..every recipe I have made so far has been wonderful! Keep ’em coming!!

    1. Hey Christy! That’s wonderful to hear – I absolutely adore this giant cookie. It’s better than eating 2 or 3 small ones. 🙂

  5. This recipe is too good for words. I made mine a bit high, so the center was doughy. Couldn’t wait to cook it extra, so my boyfriend and I devoured it.

  6. Can I prepare the dough ahead of time and put it in the oven straight from the fridge? (Does it need to be room temperature?)

  7. I would love to see a recipe for 1 large chocolate chip cookie too! I love your peanut butter one & do it whenever I need my cookie fix!

    1. Hey Kerri! You could try my XXL Chocolate Cookie and replace the cocoa powder with 2 extra Tbsp of flour. 🙂

  8. I made this cookie about a week ago as part of a little private pity party I was having for myself. You know those days where you just need a huge heaping glob of cookie to make you feel better? Yeah. And it worked! I didn’t have any of the fun mix-ins so mine was just a regular old peanut butter cookie but man it was good. I definitely underbaked it, but let’s be honest, underbaked is so much better than overbaked. Thanks for the awesome recipe!

    1. LOVE underbaked cookies. 😉 Thanks for reporting back about this and I’m glad this cookie comforted you! Cookies always seem to help, right!? 😉

  9. Hi Sally, OMG this giant cookie was DIVINE! We just couldn’t control ourselves. We almost finished the whole cookie & what remained was quickly stored away for the next day cause it was just too addictive. And of course, next day came along and not a crumb left!!!

    The saltiness & caramel added by the snicker bar was just irrestitable. Thank you again for your wonderful recipies. I will be making more of these very soon. And thnk you very much for the tip, I will definitely keep it in mind.

    Could I please have your email addy so I could send you the pic of what I had made?

    Thank you.

  10. This is soooooo AMAZING! I used peanut butter M&M’s (My favorite candy in the universe) in place of Reese’s Pieces and immediately gobbled up half of it the minute it finished cooling! I’m definitely making the other varieties!

    1. I love peanut butter M&Ms! I need to try that next time. Thanks Ally! Enjoy the other ones too.

  11. This thing is insane. I’ve made this cookie twice now and each time, I make the dough ball TOO high and it doesn’t spread out enough. But is this a problem? Not if you have a spatula and spank the damn thing a few times when comes out of the oven. (Yeah, I’m classy.) Anyway, some day I might get it right, but until then, I’ll just keep eating it ugly and ENJOYING EVERY BITE. :o)

    1. Doesn’t sound like a problem AT ALL to me. 😉 Happy you love this cookie, London!

    2. This is hilarious!  I had the same problem with this cookie.  I just smashed it with my fingers a little.  Thanks for a great late night laugh!

  12. OOOMMMGGG! So delicious, so quick, so easy, had no Reese’s Pieces, but I’m a milk chocoholic…so the added those in duplicate! Wow!!! Thank you for sharing…I’m in love!

  13. Hi Sally!

    I’d like to try this recipe for a bigger group, can I double it and make an even larger cookie? Would I need to adjust the temperature/bake time?

    1. Yes you could definitely do that. The oven temp is the same and the bake time would be longer, but I’m not sure how much.

  14. Ahhh I feel like I should half this recipe already because otherwise I’ll feel inclined to eat the whole cookie by myself (I can see the sad look on my kitten’s face just thinking about not sharing with her aww).

  15. I turned this into a giant heart cookie for my reese-pieces-loving boyfriend for valentine’s day. Unbelievable! Yet another hit from your amazing recipes.

  16. Ooo! I’d love to try this recipe out, but is it okay to skip the peanut butter? If not, is there any substitutes for it?

    1. I don’t recommend leaving out the peanut butter here. How about making this giant sugar cookie and adding Reese’s Pieces.

  17. Hi Sally! I love the idea for this cookie as much as I love peanut butter. I was wondering if I could make this recipe in a small cast iron skillet like a Pizookie. What are your thoughts on that? Thanks!

    1. I would double the cookie recipe to make it a little larger to fit into a cast iron skillet (depending on its size!). I’m sure it will be great!

  18. You are a revelation in the kitchen! Keep these fantastic peanut butter influenced recipes coming! 

  19. I just made this and it is absolutely delicious! Thank you so much for the recipe!

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