Frosted Christmas Brownies – Best Fudgy Holiday Treat

Every December, my grandmother's kitchen in Kano smelled of cocoa and vanilla while she baked for the church choir. She never called these brownies Christmas brownies, but the moment she swirled peppermint frosting on top and scattered red and green sprinkles, we all knew the season had truly begun.

These Frosted Christmas Brownies carry that memory forward. A dense, deeply chocolatey base, baked just until the center barely sets, then crowned with a silky vanilla buttercream kissed with peppermint and finished with a blizzard of holiday sprinkles.

They slice clean, travel well to potlucks, and look like you spent hours on them even though the whole thing comes together in under an hour. That is the kind of quiet magic I chase in every kitchen I visit.

About the Ingredients

1 cup (225g) unsalted butter

Melted and slightly cooled. If you only have salted butter, cut the added salt in the recipe to 1/4 teaspoon.

2 cups (400g) granulated sugar

Standard white sugar keeps the top crackly. Coconut sugar works but makes a darker, slightly chewier brownie.

4 large eggs, room temperature

Room-temperature eggs emulsify better. Submerge cold eggs in warm water for five minutes if you forgot to set them out.

1 tablespoon vanilla extract

Use real vanilla, not imitation, since the flavor carries the frosting too. Bourbon vanilla adds a lovely warmth.

1 1/4 cups (150g) all-purpose flour

Spoon and level, never scoop straight from the bag, or the brownies turn dry. A 1:1 gluten-free blend swaps in directly.

3/4 cup (65g) unsweetened cocoa powder

Dutch-process cocoa gives a darker, smoother chocolate flavor. Natural cocoa works and tastes slightly more acidic.

1/2 teaspoon fine sea salt

Salt sharpens the chocolate. Kosher salt is a fine swap if you use a slightly heaped half teaspoon.

1/2 cup (115g) unsalted butter, softened, for frosting

Truly soft butter, not melted, or the frosting turns greasy. Salted butter works if you skip the pinch of salt.

2 cups (240g) powdered sugar, sifted

Sifting prevents lumps. If yours is clumpy, pulse it in a food processor for ten seconds.

1/4 teaspoon peppermint extract

A little goes a long way. Almond or orange extract gives a lovely non-peppermint holiday twist.

2 tablespoons whole milk

Adjust by the teaspoon to reach a spreadable consistency. Oat milk or heavy cream both work beautifully.

1/4 cup red and green sprinkles, plus more for topping

Nonpareils or jimmies both work. Add them while the frosting is still tacky so they actually stick.

Tips & Tricks

Do Not Overbake

Pull the pan when the center still looks slightly moist and a toothpick comes out with fudgy crumbs, because residual heat finishes the job.

Cool Completely Before Frosting

Warm brownies melt buttercream into a puddle, so give them at least two hours at room temperature.

Sift the Powdered Sugar

Lumpy frosting cannot be fixed by more milk, only by sifting first, so do not skip this step.

Chill Before Slicing

Twenty minutes in the refrigerator firms the frosting so your squares come out with clean, sharp edges.

Step-by-Step Instructions

1. Heat the Oven

Preheat the oven to 350F (175C) and line a 9×13-inch pan with parchment, leaving overhang on two sides. The overhang is your handle for lifting the cooled slab out later.

2. Bloom the Cocoa

Whisk the melted butter, sugar, and cocoa powder in a large bowl until glossy and thick, about one minute. The mixture should look like dark, shiny mud before the eggs go in.

3. Beat in the Eggs

Add the eggs one at a time, beating well after each, then stir in the vanilla. The batter will turn thick, smooth, and slightly lighter in color.

4. Fold the Dry Ingredients

Sift the flour and salt over the batter and fold gently with a spatula just until no streaks remain. Stop the moment it comes together, because overmixing builds gluten and makes the brownies cakey.

5. Bake Until Just Set

Spread the batter evenly in the pan and bake at 350F (175C) for 30 to 35 minutes, until the edges look set and the center registers about 200F (93C) on an instant-read thermometer. A toothpick inserted two inches from the edge should come out with moist crumbs, never wet batter.

6. Cool Completely

Set the pan on a wire rack and cool for at least two hours, until the bottom of the pan feels room temperature. Frosting warm brownies is the fastest way to ruin them.

7. Whip the Frosting

Beat the softened butter with the powdered sugar, peppermint extract, milk, and a pinch of salt at medium speed for two minutes, until fluffy and spreadable. Add milk a teaspoon at a time if it feels stiff.

8. Frost and Decorate

Spread the frosting over the fully cooled brownies with an offset spatula, then scatter sprinkles generously over the top while the surface is still tacky. Press them in lightly with your palm so they hold.

9. Chill and Slice

Refrigerate the frosted slab for 20 minutes, then lift it out by the parchment and cut into 24 squares with a hot, dry knife. Wipe the blade between cuts for bakery-clean edges.

Delicious Variations

White Chocolate Peppermint

Swap half the cocoa for melted white chocolate and top with crushed candy canes for a sweeter, snowier bar.

Orange Spice Christmas

Replace the peppermint extract with orange zest and a quarter teaspoon of cinnamon for a warm, citrusy holiday twist.

Salted Caramel Frosting

Drizzle warm caramel over the frosting and finish with flaky sea salt instead of sprinkles for a grown-up version.

How to Store Frosted Christmas Brownies

Frequently Asked Questions

Bake a batch this week, pour something warm, and watch how quickly a tray of Frosted Christmas Brownies disappears. Whether you share them at a party or keep them for a quiet evening at home, they carry a little of that grandmother-kitchen warmth with every bite. Go, see, and connect.

Frosted Christmas Brownies

Frosted Christmas Brownies are rich, fudgy squares topped with peppermint vanilla frosting and festive sprinkles, the easiest holiday dessert you will make.

★★★★½ 4.8 (214 ratings)

20 minPrep time35 minCook time12Servings285 kcalCalories

Print RecipePin Recipe

🧂 Ingredients

• 1 cup (225g) unsalted butter
• 2 cups (400g) granulated sugar
• 4 large eggs, room temperature
• 1 tablespoon vanilla extract
• 1 1/4 cups (150g) all-purpose flour
• 3/4 cup (65g) unsweetened cocoa powder
• 1/2 teaspoon fine sea salt
• 1/2 cup (115g) unsalted butter, softened, for frosting
• 2 cups (240g) powdered sugar, sifted
• 1/4 teaspoon peppermint extract
• 2 tablespoons whole milk
• 1/4 cup red and green sprinkles, plus more for topping

📋 Instructions

1. 1Heat the Oven — Preheat the oven to 350F (175C) and line a 9×13-inch pan with parchment, leaving overhang on two sides. The overhang is your handle for lifting the cooled slab out later.
2. 2Bloom the Cocoa — Whisk the melted butter, sugar, and cocoa powder in a large bowl until glossy and thick, about one minute. The mixture should look like dark, shiny mud before the eggs go in.
3. 3Beat in the Eggs — Add the eggs one at a time, beating well after each, then stir in the vanilla. The batter will turn thick, smooth, and slightly lighter in color.
4. 4Fold the Dry Ingredients — Sift the flour and salt over the batter and fold gently with a spatula just until no streaks remain. Stop the moment it comes together, because overmixing builds gluten and makes the brownies cakey.
5. 5Bake Until Just Set — Spread the batter evenly in the pan and bake at 350F (175C) for 30 to 35 minutes, until the edges look set and the center registers about 200F (93C) on an instant-read thermometer. A toothpick inserted two inches from the edge should come out with moist crumbs, never wet batter.
6. 6Cool Completely — Set the pan on a wire rack and cool for at least two hours, until the bottom of the pan feels room temperature. Frosting warm brownies is the fastest way to ruin them.
7. 7Whip the Frosting — Beat the softened butter with the powdered sugar, peppermint extract, milk, and a pinch of salt at medium speed for two minutes, until fluffy and spreadable. Add milk a teaspoon at a time if it feels stiff.
8. 8Frost and Decorate — Spread the frosting over the fully cooled brownies with an offset spatula, then scatter sprinkles generously over the top while the surface is still tacky. Press them in lightly with your palm so they hold.
9. 9Chill and Slice — Refrigerate the frosted slab for 20 minutes, then lift it out by the parchment and cut into 24 squares with a hot, dry knife. Wipe the blade between cuts for bakery-clean edges.

👨‍🍳 Chef's Note: For the cleanest squares, chill the frosted slab until the buttercream is firm, then run your knife under hot water and dry it before each cut. A little patience here turns good brownies into bakery-window brownies.

Servings: 12

Cuisine: American

Course: Dessert

Nutrition (per serving): 285 kcal · 3g protein · 34g carbs · 15g fat

Written by Aisha Hassan

Aisha writes about travel and cultural immersion, sharing stories and tips from her journeys to off-the-beaten-path destinations. She emphasizes respectful tourism, budget-friendly adventures, and the importance of connecting with local communities.