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+ servings

M&M Cookie Bars

Packed with colorful M&M'S and mini chocolate chips, these cookie bars are a viral hit and a reader favorite.

Course Dessert
Cuisine American
Keyword Cookie Bars, M&M Cookie Bars
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Servings 18 bars
Calories 317 kcal


  • 2 sticks butter at room temperature
  • 1 cup granulated sugar
  • 1 cup golden brown sugar firmly packed
  • 3 large eggs
  • 1 1/2 teaspoons pure vanilla extract
  • 3 cups all-purpose flour
  • 3/4 teaspoon baking soda
  • 3/4 teaspoon salt
  • 1 1/2 cups M&M's plus more for topping
  • 1 cup mini chocolate chips plus more for topping


  1. Preheat oven to 350 degrees.
  2. Line a 9x13 baking dish with foil, leave some overhang to make removal easier.
  3. Spray foil generously with nonstick cooking spray.
  4. In the bowl of a stand mixer, beat butter, granulated sugar, and brown sugar together until fluffy.
  5. Add in eggs and vanilla extract and continue to beat.
  6. Lower speed of mixer and add flour, baking soda and salt and mix until combined.
  7. Add M&M's and mini chocolate chips and give a final stir, reserving some M&M's and mini chocolate chips for topping cookie bars.
  8. Transfer cookie dough to prepared baking dish.
  9. Press additional M&M'S and chocolate chips into top of cookie dough.
  10. Bake for 30-35 minutes or until bars are a light golden brown and just set in the center.

  11. Let cool completely and cut.
Nutrition Facts
M&M Cookie Bars
Amount Per Serving
Calories 317 Calories from Fat 117
% Daily Value*
Fat 13g20%
Saturated Fat 8g50%
Cholesterol 56mg19%
Sodium 253mg11%
Potassium 52mg1%
Carbohydrates 46g15%
Fiber 1g4%
Sugar 29g32%
Protein 4g8%
Vitamin A 376IU8%
Vitamin C 1mg1%
Calcium 32mg3%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.