Peanut Butter M&M Cookies

Name: Peanut Butter M&M Cookies
Prep time: 10 min
Cook time: 10 min
Total time: 2 h 20 min
Cuisine: American
Ingredients: 188 Grams (1 1/2 cup) All-Purpose Flour; 3/4 Teaspoon Baking Boda; 3/4 Teaspoon Salt; 2 Teaspoons Cornstarch; 4oz (1/2 cup /1 stick) Unsalted Butter, at room temp.; 4oz Creamy Peanut Butter; 100 Grams (1/2 Cup) Brown Sugar; 50 Grams (1/4 Cup) Granulated Sugar; 1 Large Egg, at room temp.; 2 Teaspoons Pure Vanilla Extract; 4oz (1/2 Cup) Semi-Sweet Chocolate Chips; 4oz (1/2 Cup) Peanut Butter M&M’s

By Elizabeth Waterson // Jan 7, 2019 (Updated Jun 8, 2025) // 4 Comments

Jump to Recipe·5 from 1 review

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Perfectly melt in your mouth peanut butter cookies are filled with Peanut Butter M&M's. You won't be able to each just one!

tall stack of peanut butter m&m cookies on a white surface with m&ms

So until recently I didn't know that Peanut Butter M&M's existed. Then my sister brought them with us to Utah earlier this year. I became ADDICTED. They are soooo good, I mean really that good. The trouble is you can easily buy a "share" bag but I don't end up sharing, I end up devouring.

The other day I felt like baking but didn't know what to bake, I continued pottering around the house doing other things, snacking on these Peanut Butter M&M's. I found myself talking to myself to stop eating them, then it hit me Peanut Butter M&M Cookies.

These cookies are perfectly soft with an ever so slight soft crunch on the outside, they literally melt in your mouth. I added some semi-sweet chocolate chips- because more chocolate is always better.

Let's get to the recipe.

white plate full of peanut butter m&m cookies on a white surface

How do you make Peanut Butter M&M Cookies?

These cookies are chilled cookies, it takes about ten minutes to make the cookie dough, then I scoop it into balls and wrap in plastic wrap then chill in the fridge for at least two hours. You could do this a few days in advance or even freeze balls of dough.

Freezing a few is my preference- then you can always have fresh cookies. There is no need to thaw the frozen cookie dough just bake it for an extra minute or two!

butter and peanut butter in a metal mixing bowl

sugar added to peanut butter mixture in a metal bowl

In the bowl of an electric mixer cream butter and peanut butter for 2 minutes. Add in brown sugar for 3 minutes.

egg added to wet ingredients for a peanut butter m&m cookie recipe

wet ingredients in a metal bowl for a peanut butter m&m cookie recipe

Add in egg and vanilla extract, mix for another 2 minutes.

dry ingredients in a glass bowl for a peanut butter m&m cookie recipe

dry ingredients gently folded into wet for a peanut butter m&m cookie recipe

In a medium bowl mix together flour, baking soda, and salt set aside.

Gently mix in flour mixture then fold in Peanut Butter M&M's and chocolate chunks.

chocolate chips and peanut butter m&ms added to cookie dough on a white marble surface with a white and grey linen and open bag of m&ms spilling out

Scoop dough into 1.5 Tablespoons, place on a tray and cover with plastic wrap. Chill dough for 2 hours then preheat oven to 350F/180C and line a baking sheet with Silpat (affiliate link) liner, if using one.

peanut butter m&m cookie dough scooped on a silpat lined baking sheet on a white marble surface with a bag of m&ms spilling out

Bake for 8-10 minutes. I like to take cookies out when they look almost done and let sit in the pan for 5 minutes then transfer to wire rack to cool completely.

For a similar cookie that has more chew try my monster cookie recipe, made with oats they are extra chewy and delicious! Or don't miss my M&M Brownie recipe or Reese's Peanut Butter Cookies.

Check out this post on my Cookie Baking Tips

plate full of cookies and close up of peanut butter m&m cookies on a white marble surface

Fancy more cookies? Try these:

★★★★★ Please let me know if you make this recipe by leaving a star rating and comment below!

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Recipe Card

Peanut Butter M&M Cookies

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5 from 1 review

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Perfectly melt in your mouth peanut butter cookies are filled with Peanut Butter M&M's. You won't be able to each just one!

Total Time: 2 Hours 20 Minutes
Yield: 2 Dozen 1x

Instructions

In the bowl of an electric mixer cream butter and peanut butter for 2 minutes. Add in granulated sugar and brown sugar mix for 3 minutes. Add in egg and vanilla extract, mix for another minute.
In a medium bowl mix together flour, baking soda, cornstarch, and salt set aside.
Gently mix in flour mixture to the wet ingredients, then fold in Peanut Butter M&M's and chocolate chunks. Scoop dough into 1.5 Tablespoons, place on a tray and cover with plastic wrap. Chill dough for 2 hours then preheat oven to 350F/180C and line a baking sheet with Silpat (affiliate link) liner, if using one.
Bake for 8-10 minutes. I like to take cookies out when they look almost done and let sit in the pan for 5 minutes then transfer to wire rack to cool completely.