These Peanut Butter M&M Cookies have a soft peanut butter cookie dough studded with creamy Peanut Butter M&M’s. It’s the perfect cookie recipe for the peanut butter lover!

If you’re not familiar with a Peanut Butter M&M, it’s like Reese’s Pieces but even bigger and creamier.

Peanut Butter M&M Cookies on White Plate

A friend introduced them to me and I was simultaneously very happy and deadly upset over how delicious they are.

They’re the best M&M ever, if you ask me.

This cookie has both amazing textures and intense peanut butter flavor.

I love biting into the soft peanut butter cookie dough, but getting those bits of hard candy shell that yield to the creamy peanut butter centers of the M&Ms.

Peanut M&M Cookies - on White Plate

Even though I highly recommend peanut butter M&Ms here, you may use other types of M&Ms.

You can use regular chocolate M&Ms, the peanut M&Ms with the actual nut inside, pretzel M&Ms, and so on.

How to Make Peanut Butter M&M Cookies:

Start by placing brown sugar, granulated sugar, and softened butter in a bowl:

Butter, Brown Sugar, and Granulated Sugar in Bowl

Cream them together, then add in peanut butter and an egg:

Creamed Butter & Sugar in Bowl with Peanut Butter and Egg

Mix until incorporated:

Butter Sugar Egg Mixture in Bowl with Beaters

Then add your dry ingredients, which is a mixture of flour, baking powder, baking soda, and salt:

Flour Added to Wet Ingredients In Bowl

Just before the flour has disappeared, add peanut butter M&Ms:

M&Ms Added to Cookie Dough in Bowl

Use a large cookie scoop to portion out mounds of cookie dough.

You may place them on a lined baking sheet to bake immediately, or you can place scoops on a plate and freeze them for later.

M and M Cookies in balls On Plate

After 12-14 minutes in the oven, the dough balls will spread and bake down, with the M&Ms still intact:

M&M Cookie Recipe - Served on White Plate

I love eating the cookies straight out of the oven, as the centers of the candies get especially creamy and warm.

Monster Cookies are a similar cookie that I also love making, along with SnickerdoodlesShortbread Cookies, and Molasses Cookies. Enjoy!

Peanut Butter M&M Cookies on White Plate

Peanut Butter M&M Cookies

These Peanut Butter M&M Cookies have a soft peanut butter cookie dough studded with Peanut Butter M&M's.

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  • 1.25 cups all-purpose flour (6.25 ounces by weight)
  • 3/4 tsp baking soda
  • 1/2 tsp baking powder
  • 1/4 tsp sea salt
  • 1/2 cup unsalted butter softened
  • 1/2 cup sugar
  • 1/2 cup packed brown sugar
  • 1/2 cup peanut butter
  • 1 large egg
  • 2 cups peanut butter M&Ms


  • Preheat the oven to 350 degrees F. Line a baking sheet with a silicone mat or parchment paper.
  • In a medium bowl, whisk to combine the flour, baking soda, baking powder, and sea salt. Set aside.
  • Place the butter, sugar, and brown sugar in a large bowl and cream them together with a hand mixer for approximately two minutes, until the mixture looks fluffy. 
  • Add the peanut butter and egg and mix until incorporated. 
  • Add the dry ingredients and mix until the flour has almost disappeared. 
  • Finally, add the peanut butter M&Ms and stir them in gently with a spatula.
  • Using a large cookie scoop, portion out mounds of the cookie dough on your prepared baking sheet, leaving 2 inches between each cookie. 
  • Bake for 12-14 minutes, until the edges are slightly brown and the mounds have flattened a bit. Let the cookies cool, then enjoy!


Cookie dough base adapted from Simply Recipes.


Calories: 188kcal, Carbohydrates: 22g, Protein: 3g, Fat: 10g, Saturated Fat: 4g, Cholesterol: 25mg, Sodium: 139mg, Potassium: 91mg, Sugar: 13g, Vitamin A: 190IU, Calcium: 21mg, Iron: 0.7mg

Nutrition is estimated using a food database and is only intended to be used as a guideline for informational purposes.

Post updated in November 2018. Originally published January 2014.