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+ servings

Peanut Butter M&M Cookie Bars

These simple and fun peanut butter cookie bars filled with M&Ms are here to satisfy your sweet craving!
Peanut Butter M&M Cookie Bars
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5 from 1 vote


  • 1/2 cup unsalted butter (113 grams), softened to room temperature
  • 3/4 cup smooth or crunch peanut butter (200 grams)
  • 1 1/4 cup light or dark brown sugar (265 grams)
  • 1 teaspoon vanilla extract
  • 2 large eggs
  • 2 cups all-purpose flour (240 grams)
  • 3/4 teaspoon baking soda
  • 3/4 teaspoon coarse salt
  • 1 cup M&M candies (210 grams), I used mini


  • Preheat oven to 350 degrees F. Grease a 9-inch baking pan and line with parchment paper.
  • With an electric mixer beat the butter, peanut butter, and brown sugar until light and creamy. Add vanilla extract and eggs, mixing after each.
  • Add the flour, baking soda, and salt and mix until just combined. Add the M&Ms.
  • Spread the cookie dough into the prepared pan and bake until edges are golden brown and middle is puffed, 25-30 minutes.
  • For best results and prettiest slices, let cool completely before slicing. Once cool, use parchment paper to lift bars out of pan and transfer to a cutting board. Cut into 16 equal pieces.


Calories: 318kcal, Carbohydrates: 40g, Protein: 6g, Fat: 16g, Saturated Fat: 7g, Cholesterol: 38mg, Sodium: 238mg, Potassium: 126mg, Fiber: 1g, Sugar: 26g, Vitamin A: 236IU, Vitamin C: 1mg, Calcium: 42mg, Iron: 1mg
Have you tried this recipe?I’d love to hear about it! Leave a review below or take a photo and tag it on Instagram @completelydelicious with #completelydelicious.