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stack of m&m brownies on a light pink plate on a blue linen on a grey surface

M&M Brownies

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Thick, rich, fudgy M&M brownies are a favorite among adults and kids alike. This easy brownie recipe has the perfect chewiness and crinkly top. The batter is studded with chocolate chips and M&MS then the brownies are topped with a layer of colorful M&Ms. Step-by-step photos teach you how to bake this party favorite dessert recipe!

  • Total Time: 45 minutes
  • Yield: 16 Brownies 1x

Ingredients

Units Scale
  • 2oz (1/4 Cup) Water
  • 1oz (2 Tbsp) Unsalted Butter
  • 125 grams(1 1/8 cups) Granulated Sugar
  • 125 grams(1 1/8 cups) Light Brown Sugar
  • 90 grams (Scant Cup) Dutch-process Cocoa Powder
  • 3oz (scant 1/3 cup) Vegetable Oil
  • 1 Tablespoon Pure Vanilla Extract
  • 1 Large Egg Yolk and 1 Large Egg, at room temp.
  • 1/8 Teaspoon Baking Soda
  • 1/2 Teaspoon Salt
  • 1 Tablespoon Cornstarch/ Cornflour
  • 60 grams (scant 1/2 cup) All-Purpose/ Plain Flour
  • 4oz Chocolate (chips, chunks, or bars chopped)
  • 1 cup M&Ms, divided

Instructions

  1. Preheat your oven to 350F/180C and line a 9X9 or 8X8 square pan with foil and grease heavily.
  2. In a large pot add the water, butter, sugar, and cocoa powder. Cook on medium heat for 2-3 minutes until it is all combined together. Take off heat and let cool for five minutes. Then add the oil. 
  3. Let sit for another couple of minutes then add the egg, egg yolk, and vanilla. Whisk to combine, make sure everything is evenly combined. 
  4. Add the baking soda, salt, cornstarch, and mix to combine. Gently add the flour and when almost combined add chocolate chips and M&Ms by using a spatula to fold in until just combined. Do not over mix, this will affect the end product.
  5. Pour the batter into the prepared pan then sprinkle the remaining M&Ms on top in an even layer.
  6. Bake for 25-35 minutes. Everyone’s oven is different, for me, the brownies always bake within 29-31 minutes, but I would start checking at 25 minutes for your oven. Don't overbake the brownies. You want a toothpick in the center to come out with moist crumbs, not completely dry. Place the pan on a wire rack to cool completely before cutting.
  7. Store in an air-tight container on the counter for up to 4 days.
  • Author: Elizabeth Waterson I Confessions of a Baking Queen
  • Prep Time: 15
  • Cook Time: 30
  • Category: Dessert
  • Method: Bake
  • Cuisine: American
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