Sweet Valentine’s M&M’s Brownies

I didn’t know brownies could get any better until I threw Valentine’s M&M’s into the batter. My kids go crazy for these every February, and honestly, I’m right there with them scraping the pan for corner pieces.

The thing about these brownies is they’re fudgy in the middle but still have that crackly top that makes a good brownie great. The M&M’s add little pockets of chocolate that stay soft even after baking—plus they look festive without you having to do anything fancy. I use the Valentine’s colors because they’re pink and red, but regular M&M’s work just fine if you’re making these any other time of year.

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What Kind of Chocolate Should I Use?

For these brownies, you’ll want to use good quality chocolate since it’s one of the key ingredients that gives your brownies their rich flavor. Semi-sweet or dark chocolate works great here, and you can use either chocolate bars or baking chocolate – just avoid using chocolate chips since they’re formulated to hold their shape and won’t melt as smoothly. If you prefer sweeter brownies, go with milk chocolate, but keep in mind that the recipe already has quite a bit of sugar in it. Whatever you choose, make sure to chop it into small, even pieces so it melts evenly when you combine it with the butter.

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Options for Substitutions

These brownies are pretty forgiving when it comes to swapping ingredients:

• Butter: You can replace butter with coconut oil or vegetable oil in equal amounts. Keep in mind that oil will make the brownies slightly more fudgy and less cake-like.
• Brown sugar: If you’re out of brown sugar, mix white sugar with a tablespoon of molasses, or just use all white sugar. The brownies will be a bit less moist but still tasty.
• Eggs: For each egg, you can use 1/4 cup of applesauce or mashed banana, though this will change the texture slightly. Flax eggs (1 tablespoon ground flaxseed mixed with 3 tablespoons water per egg) work too for a vegan option.
• Cocoa powder: Make sure to stick with unsweetened cocoa powder for this recipe – it’s what gives these brownies their chocolate punch. Dutch-processed or natural cocoa both work fine.
• M&M candies: While Valentine’s M&M’s make these festive, regular M&M’s, chocolate chips, or chopped chocolate bars work just as well. You can also try Reese’s Pieces or any candy-coated chocolate you like.

Watch Out for These Mistakes While Baking

Overbaking is the number one reason brownies turn out dry and crumbly instead of fudgy – pull them from the oven when a toothpick inserted in the center comes out with a few moist crumbs, not completely clean.

Skipping the cooling step is tempting but will result in a gooey mess when you try to cut them, so let your brownies cool completely in the pan for at least an hour before slicing.

When melting the butter and chocolate mixture, make sure the bowl doesn’t touch the boiling water directly and remove it from heat as soon as everything melts to avoid scorching, which can give your brownies a bitter taste.

For cleaner cuts, wipe your knife between each slice and consider chilling the brownies in the fridge for 30 minutes before cutting – this makes the whole process much easier.

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What to Serve With M&M’s Brownies?

These brownies are pretty rich and fudgy on their own, so they pair perfectly with a cold glass of milk or a scoop of vanilla ice cream on the side. If you’re serving them for a Valentine’s Day party, consider setting out some fresh strawberries or raspberries to balance out the sweetness. A hot cup of coffee or hot chocolate also makes a great companion, especially if you’re enjoying these as an afternoon treat. For an extra special touch, you can drizzle some caramel or chocolate sauce over the top and add a dollop of whipped cream.

Storage Instructions

Store: Keep your brownies fresh and fudgy by storing them in an airtight container at room temperature for up to 4 days. If you want them to last a bit longer, pop them in the fridge where they’ll stay good for about a week. They get a little firmer when cold, but still taste amazing!

Freeze: These brownies freeze really well, which is great for making them ahead for Valentine’s Day. Wrap individual pieces in plastic wrap, then store them in a freezer bag for up to 3 months. You can even freeze the whole pan if you haven’t cut them yet.

Serve: Let frozen brownies thaw at room temperature for about an hour, or if you’re impatient like me, microwave them for 15-20 seconds for that fresh-from-the-oven warmth. Room temperature brownies are perfect as-is, but a quick 10-second zap makes them extra gooey again.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 4100-4350
• Protein: 38-44 g
• Fat: 240-260 g
• Carbohydrates: 500-540 g

Ingredients

• 1.5 cups butter (I like Kerrygold unsalted butter for this)
• 3 oz chocolate (chopped into 1/4-inch pieces for even melting)
• 1.75 cups brown sugar
• 1 cup sugar
• 4 eggs (room temperature, about 70°F)
• 1 cup cocoa powder (I use Ghirardelli Majestic for a rich dark color)
• 1/2 tsp salt
• 1/4 tsp espresso powder
• 3.5 tsp vanilla essence
• 3/4 cup flour (I always use King Arthur all-purpose flour)
• 2/3 cup M&M candies

Step 1: Prepare Your Pan and Mise en Place

• Parchment paper
• 3 oz chocolate
• 1 cup cocoa powder
• 1/2 tsp salt
• 1/4 tsp espresso powder
• 3.5 tsp vanilla essence

Preheat your oven to 350°F and line a 9×13 inch baking pan with parchment paper, allowing some overhang on the sides for easy removal later.

While the oven heats, chop your chocolate into small, uniform 1/4-inch pieces to ensure even melting, and measure out all your dry ingredients and vanilla into separate small bowls so everything is ready when you need it.

Step 2: Melt Butter, Chocolate, and Sugars Together

• 1.5 cups butter
• 3 oz chocolate
• 1.75 cups brown sugar
• 1 cup sugar

Place the butter, chopped chocolate, brown sugar, and sugar in a heat-safe bowl and set it over a pot of gently simmering water (a double boiler setup).

Stir occasionally until everything is completely melted and combined, about 5-7 minutes.

The even melting of the chocolate pieces will give you a smooth, glossy base—this is where the quality chocolate and butter really shine through.

Once melted, remove the bowl from heat and let it cool for about 2 minutes; this slight cooling prevents the eggs from scrambling when added next.

Step 3: Incorporate Eggs One at a Time

• 4 eggs
• Melted chocolate mixture from Step 2

Make sure your eggs are at room temperature (around 70°F) before beginning, as cold eggs won’t incorporate as smoothly and will cool the mixture too much.

Add the eggs one at a time to the cooled chocolate mixture, stirring thoroughly after each addition until the batter is smooth and glossy before adding the next egg.

This gradual incorporation creates an emulsion that gives the brownies their dense, fudgy texture.

Step 4: Build the Flavor Base with Cocoa and Aromatics

• Egg and chocolate mixture from Step 3
• 1 cup cocoa powder
• 1/2 tsp salt
• 1/4 tsp espresso powder
• 3.5 tsp vanilla essence

Stir in the cocoa powder, salt, espresso powder, and vanilla essence to the egg-chocolate mixture until completely combined and no streaks of cocoa remain.

The espresso powder is a secret ingredient that deepens the chocolate flavor without adding any coffee taste—I find it elevates the richness significantly.

Whisk vigorously for about 30 seconds to ensure everything is well distributed.

Step 5: Fold in Flour and Transfer to Pan

• 3/4 cup flour
• Chocolate batter from Step 4

Gently fold in the flour with a spatula using as few strokes as possible—about 10-15 folds until just combined.

Overmixing develops gluten and makes brownies tough rather than fudgy, so stop as soon as you don’t see any white streaks.

Pour the batter into your prepared pan and smooth the top evenly.

Step 6: Add M&Ms and Bake

• 2/3 cup M&M candies
• Batter in prepared pan from Step 5

Scatter the M&M candies evenly over the top of the batter—I press them in slightly so they nestle into the batter rather than sitting on top, which helps them bake in slightly and stay distributed.

Bake for 45-50 minutes; the brownies should look set around the edges but still have a slight jiggle in the very center when you gently shake the pan.

A toothpick inserted in the center should come out with just a few moist crumbs, not completely clean.

Step 7: Cool and Serve

Remove the pan from the oven and let the brownies cool completely in the pan at room temperature before cutting—this usually takes 1-2 hours.

This cooling time allows the structure to set properly so the brownies hold together when cut.

Once cooled, lift the brownies out using the parchment paper overhang and cut into squares.

The M&Ms will have softened slightly, creating pockets of chocolate throughout each bite.

Sweet Valentine's M&M's Brownies

Delicious Sweet Valentine's M&M's Brownies recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 25 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 12 minutes mins

Servings 20 pieces

Calories 4225 kcal

Ingredients

  

• 1.5 cups butter (I like Kerrygold unsalted butter for this)
• 3 oz chocolate (chopped into 1/4-inch pieces for even melting)
• 1.75 cups brown sugar
• 1 cup sugar
• 4 eggs (room temperature, about 70°F)
• 1 cup cocoa powder (I use Ghirardelli Majestic for a rich dark color)
• 1/2 tsp salt
• 1/4 tsp espresso powder
• 3.5 tsp vanilla essence
• 3/4 cup flour (I always use King Arthur all-purpose flour)
• 2/3 cup M&M candies

Instructions

 

• Preheat your oven to 350°F and line a 9x13 inch baking pan with parchment paper, allowing some overhang on the sides for easy removal later. While the oven heats, chop your chocolate into small, uniform 1/4-inch pieces to ensure even melting, and measure out all your dry ingredients and vanilla into separate small bowls so everything is ready when you need it.
• Place the butter, chopped chocolate, brown sugar, and sugar in a heat-safe bowl and set it over a pot of gently simmering water (a double boiler setup). Stir occasionally until everything is completely melted and combined, about 5-7 minutes. The even melting of the chocolate pieces will give you a smooth, glossy base—this is where the quality chocolate and butter really shine through. Once melted, remove the bowl from heat and let it cool for about 2 minutes; this slight cooling prevents the eggs from scrambling when added next.
• Make sure your eggs are at room temperature (around 70°F) before beginning, as cold eggs won't incorporate as smoothly and will cool the mixture too much. Add the eggs one at a time to the cooled chocolate mixture, stirring thoroughly after each addition until the batter is smooth and glossy before adding the next egg. This gradual incorporation creates an emulsion that gives the brownies their dense, fudgy texture.
• Stir in the cocoa powder, salt, espresso powder, and vanilla essence to the egg-chocolate mixture until completely combined and no streaks of cocoa remain. The espresso powder is a secret ingredient that deepens the chocolate flavor without adding any coffee taste—I find it elevates the richness significantly. Whisk vigorously for about 30 seconds to ensure everything is well distributed.
• Gently fold in the flour with a spatula using as few strokes as possible—about 10-15 folds until just combined. Overmixing develops gluten and makes brownies tough rather than fudgy, so stop as soon as you don't see any white streaks. Pour the batter into your prepared pan and smooth the top evenly.
• Scatter the M&M candies evenly over the top of the batter—I press them in slightly so they nestle into the batter rather than sitting on top, which helps them bake in slightly and stay distributed. Bake for 45-50 minutes; the brownies should look set around the edges but still have a slight jiggle in the very center when you gently shake the pan. A toothpick inserted in the center should come out with just a few moist crumbs, not completely clean.
• Remove the pan from the oven and let the brownies cool completely in the pan at room temperature before cutting—this usually takes 1-2 hours. This cooling time allows the structure to set properly so the brownies hold together when cut. Once cooled, lift the brownies out using the parchment paper overhang and cut into squares. The M&Ms will have softened slightly, creating pockets of chocolate throughout each bite.