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overhead view of a stack of cookie bars with m&ms in them
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M&M Cookie Bars

M&M Cookie Bars are the easy dessert you are looking for! This bar recipe is fast to put together and melt in your mouth delicious.
Prep Time20 mins
Cook Time20 mins
Total Time40 mins
Course: Dessert
Cuisine: American
Keyword: baking from scratch, dessert, easy dessert
Servings: 24 bars
Calories: 232kcal
Author: Lisa Longley


  • 3 cups all purpose flour scooped into the measuring cups and then leveled off (360 grams)
  • 1 teaspoon baking soda 6 grams
  • 1/2 teaspoon salt 3 grams
  • 14 tablespoons unsalted butter (198 grams) room temperature
  • 3/4 cup granulated sugar (150 grams)
  • 3/4 cup light brown sugar (165 grams)
  • 2 teaspoons vanilla extract (9.9 ml)
  • 2 large eggs room temperature
  • 1 1/2 cups M&Ms


  • Preheat your oven to 350 degrees. Spray a 9 x13 inch baking dish with cooking spray. Set aside.
  • In a medium bowl whisk together the flour, baking soda, and salt. Set aside.
  • In a large bowl beat together the butter with the sugars until it is light and fluffy, about 3 to 6 minutes.
  • One at a time add the eggs and then the vanilla extract. Make sure to scrape down the sides of the bowl as necessary.
  • Add all of the flour mixture and either fold it in with a spatula at first or turn on the mixer very low until it begins to combine, then turn the mixer on high and beat until just fully combined. Fold in the M&Ms.
  • Press the dough into the prepared baking dish and bake for 20 to 25 minutes or until the edges are golden brown. Allow to cool before slicing. For best results, store in an airtight container for up to 1 week.


Serving: 1bar | Calories: 232kcal | Carbohydrates: 31g | Protein: 4g | Fat: 11g | Saturated Fat: 6g | Monounsaturated Fat: 2g | Cholesterol: 66mg | Sodium: 106mg | Potassium: 20mg | Fiber: 1g | Sugar: 12g