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M&M Chocolate Chip Bars

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These M&M Chocolate Chip Bars are a nostalgic, chewy tray bake combining colorful candy-coated crunch and melty chocolate chip pockets, ideal for school lunches, bake sales, or casual gatherings.
Print Recipe
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 1 hour 45 minutes
Servings: 24 bars
Course: Dessert, Snack
Cuisine: American
Calories: 255
Ingredients Method Nutrition Notes

Ingredients
  

Dry Ingredients
  • 2.75 cups all-purpose flour Provides structure and the right chew.
  • 1.5 teaspoons cornstarch Keeps the bars tender by softening the flour proteins.
  • 1 teaspoon baking soda Gives a light lift and a slightly cakey texture.
  • 0.5 teaspoon salt Balances sweetness and enhances flavor.
Wet Ingredients
  • 1 cup unsalted butter, melted and cooled Adds rich butter flavor and moistness.
  • 1 cup packed light or dark brown sugar Brings deep caramel notes and chew.
  • 0.5 cup granulated sugar Helps with edge crispness and sweetness.
  • 2 large eggs, at room temperature Bind the dough and add richness.
  • 2 teaspoons pure vanilla extract Provides warm aromatics and depth.
Mix-ins
  • 1.25 cups mini or regular-size M&Ms Colorful crunch and candy-coated sweetness.
  • 0.75 cups semi-sweet chocolate chips For melty pockets of chocolate throughout.

Method
 

Preparation
  1. Preheat the oven to 350°F (177°C) and position the oven rack in the center.
  2. Line a 9×13-inch baking pan with parchment paper, leaving enough to lift the bars out later.
  3. In a medium bowl, whisk together the flour, cornstarch, baking soda, and salt until evenly combined.
  4. In a large bowl, stir the melted butter with the brown and granulated sugars until smooth.
  5. Add the eggs and vanilla extract into the butter mixture and mix until glossy.
  6. Pour the wet mixture into the dry ingredients and stir until just combined.
  7. Fold in the M&Ms and chocolate chips until evenly distributed.
  8. Transfer the dough to the prepared pan and smooth it out into an even layer.
Baking
  1. Bake for 26 to 30 minutes, or until lightly browned and a toothpick comes out mostly clean.
  2. Allow the bars to cool in the pan for at least one hour before cutting into squares.

Nutrition

Serving: 1gCalories: 255kcalCarbohydrates: 34gProtein: 2gFat: 12gSaturated Fat: 7gSodium: 130mgFiber: 1gSugar: 17g

Notes

Tips: Let the melted butter cool to warm before adding eggs. If cleaner edges are desired, chill the pan for 10 minutes after smoothing the dough. Store bars in an airtight container at room temperature for up to 4 days.

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