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Peanut Butter Oatmeal M&M Cookies

Peanut Butter Oatmeal M&M Cookies

Jennie Duncan
These Peanut Butter Oatmeal M&M Cookies may be the best peanut butter and oatmeal cookie you will ever try! Loaded with peanut butter flavor and colorful candy M&Ms your family will love these!
Prep Time 10 mins
Cook Time 12 mins
Course Cookie, Dessert
Cuisine American, Cookie, dessert
Servings 24 cookies
Calories 292 kcal


  • 1 ½ cups unsalted butter (softened to room temperature)
  • ½ cup granulated sugar
  • ½ cup brown sugar
  • 2 large egg
  • 1 cup smooth peanut butter
  • 1 teaspoon vanilla extract
  • 1 ½ cups all purpose flour
  • 2 cups quick oats
  • 1 teaspoon baking soda
  • ½ teaspoon salt
  • ¾ cup M&Ms (regular not peanuts)


  • Preheat the oven to 350 F and prepare a cooking sheet with nonstick cooking spray or parchment paper.
  • Combine butter, sugar, brown sugar, and egg into a large mixing bowl. Beat on low with an electric hand mixer or stand mixer until smooth and creamy.
  • Add peanut butter and vanilla. Mix on low until combined. Set aside.
  • In a separate large bowl mix together all purpose flour, quick oats, baking soda, and salt.
  • Whisk the dry Ingredients until combine. Next slowly add in to wet ingredients. Add ½ or 1 cup at a time, beat on low until combined, and then continue with the next batch. (Mix until ingredients are almost combined, a few lumps here and there are fine.)
  • Stir in M&Ms. Place your dough in the fridge to chill for 2 hours in the fridge. It is important to chill the batter between the batches too.
  • The batter will resemble playdough and should not be sticky after chilling. Scoop 2 tablespoonfuls of batter, rolling it into about 2 inch balls. 
  • Arrange the cookie balls (2 tablespoonful sized balls) on a baking sheet lined with parchment paper at least 2 inches apart.
  • Bake for 10-12 minutes (the time varies due to different ovens).
  • The cookies will have a very soft center inside. Once they cool down they will set well and the texture inside remains soft, chewy and buttery. 
  • Let the cookies stand in the pan for 5-10 minutes before transferring to a wire rack.


Cooking Tip: Mix until ingredients are almost combined, a few lumps here and there are fine.
Cooking Tip: Do not press down on the dough balls. Bake them as dough balls.


Serving: 1cookieCalories: 292kcalCarbohydrates: 26gProtein: 5gFat: 19gSaturated Fat: 10gTrans Fat: 1gCholesterol: 47mgSodium: 154mgPotassium: 108mgFiber: 2gSugar: 14gVitamin A: 392IUVitamin C: 1mgCalcium: 27mgIron: 1mg
Keyword Peanut Butter Oatmeal M&M Cookies
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