Chewy, fudgy and packed with colorful candy crunch, these M&M's brownies are the ultimate treat for any occasion.
These M&M’s brownies are the perfect marriage of decadent, fudgy brownies and the crunchy, colorful candies. They aren’t just fun to look at; they’re also easy to make, with a cocoa-based brownie batter that bakes up moist and chocolaty. To keep the candies from melting, don’t add the M&M’s until about halfway through the bake time, and lightly press them into the surface for a picture-perfect finish. Whether you’re baking for a birthday party, a bake sale or just because, this top brownie recipe delivers a pop of color and chocolate in every bite.
Ingredients for M&M’s Brownies
- Baking cocoa: Baking cocoa, also known as cocoa powder, is the key ingredient for chocolate brownies with M&M’s. Use unsweetened cocoa powder.
- Baking soda: Baking soda contributes to the brownies’ rise and gives them a soft, chewy texture.
- Butter: Melted butter provides rich flavor and adds to the texture.
- Boiling water: While it may seem insignificant, boiling water is essential for this batter. It blooms the baking cocoa to maximize its flavor and gives the brownies a moist texture.
- Sugar: Sweeten the brownies with granulated sugar.
- Eggs: Eggs help the brownies rise while baking. Use room-temperature eggs to incorporate them into the batter more easily.
- Vanilla extract: A small amount of vanilla extract goes a long way in enhancing the way these brownies taste.
- All-purpose flour: Incorporate flour into the brownie batter to provide structure.
- Salt: Mix just a touch of salt into the batter to balance out the sweetness in this brownie recipe.
- M&M’s: Dress up classic brownies with M&M’s. Use regular chocolate M&M’s candies or other M&M’s flavor options, such as peanut or dark chocolate.
Directions
Step 1: Prep the chocolate mixture
Preheat the oven to 350°F. In a large bowl, combine the baking cocoa and baking soda. Stir in 1/3 cup of melted butter. Add boiling water and stir until the mixture is well blended.
Step 2: Make the brownie batter

Stir in the sugar, eggs, remaining 1/3 cup of melted butter and vanilla. Combine the flour and salt in a small bowl and stir them into the cocoa mixture.
Editor’s Tip: Avoid overmixing the brownie batter to maintain its chewy texture. Mixing the batter too much can result in a cakey brownie.
Step 3: Bake the brownies

Pour the batter into a greased 13×9-inch baking pan. Bake the brownies for 15 minutes, then evenly sprinkle the top with M&M’s. Continue baking until the brownies begin to pull away from the sides of the pan, 20 to 25 minutes longer. Let the brownies cool completely in the pan on a wire rack.

M&M’s Brownies Variations
- Add espresso powder: This secret ingredient for chocolate desserts enhances the chocolate flavor of these brownies. A small amount of espresso powder goes a long way; mix 1 teaspoon with the sugar and eggs.
- Go for peanut butter: For a classic chocolate and peanut butter combo, use Reese’s Pieces instead of (or in addition to) M&M’s.
- Top with frosting: For a play on texture and flavor, spread fudge frosting or peanut butter frosting over the top of these brownies.
How to Store M&M’s Brownies
Store your brownies in an airtight container to maintain their soft, chewy texture and chocolaty flavor. Alternatively, you can store them in a zip-top storage bag or wrapped in storage wrap.
How long do M&M’s brownies last?
Store the brownies at room temperature for two to three weeks. They can also be stored in the fridge for two to three months.
Can you freeze M&M’s brownies?
Freezing brownies is simple. Store the cooled brownies in an airtight container or wrap them in storage wrap and aluminum foil. Keep the brownies in the freezer for 8 to 12 months and let them thaw at room temperature before eating them.
M&M’s Brownies Tips

Can you add M&M’s to the batter?
This recipe calls for sprinkling M&Ms on top of the brownies during baking. If you want more, you can certainly stir additional M&Ms into the batter. M&M’s mixed into the batter may melt and their color may run a bit.
Can you make M&M’s brownies with a box mix?
Do you have a favorite boxed brownie mix? Use that instead for an easy shortcut. Pour the batter into the prepared baking pan and sprinkle M&Ms on top.
How should you serve M&M’s brownies?
While M&M’s brownies are a great treat by themselves, you can use them for many other desserts. Top brownies with a scoop of ice cream to make a brownie sundae, or pair them with whipped cream and caramel sauce. You can also use pieces of M&M’s brownies to make a brownie trifle.
Ingredients
- 3/4 cup baking cocoa
- 1/2 teaspoon baking soda
- 2/3 cup butter, melted, divided
- 1/2 cup boiling water
- 2 cups sugar
- 2 large eggs, room temperature
- 1 teaspoon vanilla extract
- 1-1/3 cups all-purpose flour
- 1/4 teaspoon salt
- 1/2 cup milk chocolate M&M's
Directions
- Preheat oven to 350°. In a large bowl, combine cocoa and baking soda. Stir in 1/3 cup melted butter. Add boiling water; stir until well blended. Stir in sugar, eggs, remaining 1/3 cup melted butter and vanilla. Combine flour and salt; stir into cocoa mixture.
- Pour into a greased 13x9-in. baking pan. Bake 15 minutes; evenly sprinkle with M&M's. Continue baking until brownies begin to pull away from sides of pan, 20-25 minutes longer. Cool in pan on a wire rack.
