m&m cookie bars
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M&M Cookie Bars Recipe

Christmas M&M Cookie Bars - Gooey, soft and fluffy cookie bars loaded with M&M's and chocolate chips. So easy to make and perfect for a cookie exchange or holiday party!
Prep Time15 mins
Cook Time30 mins
Total Time40 mins
Course: Dessert
Cuisine: American
Keyword: m&m cookie bars
Servings: 24
Calories: 271kcal
Author: Jamielyn Nye


  • 1 cup unsalted butter (at room temperature)
  • 1 cup light brown sugar
  • 3/4 cup granulated sugar
  • 2 large eggs
  • 2 teaspoons vanilla
  • 3 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1 teaspoon salt
  • 1 cup chocolate chips (plus more for tops if desired)
  • 1 cup M&M’s (plus more for tops if desired)


  • Preheat the oven to 325°F. For thick bars, line a 9x13" pan with foil. For thinner bars, line a 15x10" pan. Leave an over hang for easy removal. Then spray with non-stick spray.
  • In a large bowl using a mixer, cream together the butter and sugars for 1 minute. Add the eggs and vanilla and mix until combined.
  • Add the flour, baking soda and salt and stir mixture just until combined. Fold in the chocolate chips and M&M’s (saving about 1/4 cup for the top).
  • Scoop cookie dough into the pan. Then place extra M&M’s and chocolate chips on the top.
  • Bake for 30-35 minutes, or until the top is barely golden brown. Allow to cool completely, then remove and slice.
  • Store in an airtight container for up to 3 days.


To top M&M bars with glaze, combine 1 cup powdered sugar + 1 TB milk and drizzle over cookies once cooled.


Calories: 271kcal | Carbohydrates: 38g | Protein: 2g | Fat: 11g | Saturated Fat: 7g | Cholesterol: 36mg | Sodium: 162mg | Potassium: 36mg | Sugar: 25g | Vitamin A: 5.8% | Vitamin C: 0.1% | Calcium: 3.3% | Iron: 5.9%