These brownies combine the classic fudgy base everyone trusts with a bright, minty frosting dotted with little chocolate chips. The contrast between warm, chocolatey brownie and cool, mint-scented buttercream is immediate and addictive. I’ve made these for potlucks, weekday dessert emergencies, and a last-minute dinner party, and they always disappear fast.

I like recipes that are straightforward and forgiving. This one asks for a little attention during the chocolate melting and while folding, but otherwise it’s approachable: no tempering, no special pans beyond a 13x9x2-inch baking pan, and a frosting that comes together with an electric mixer. If you have a soft spot for mint-chocolate pairings, this is the version worth committing to.

Below you’ll find everything you need: the ingredient list exactly as used, step-by-step directions (kept exactly as written so you can follow precisely), practical equipment suggestions, common mistakes and how to avoid them, plus sensible storage and serving tips so your brownies look and taste their best.

Ingredients

1 1/2 sticks butter — melted with unsweetened chocolate to form the brownie’s glossy base.
4 ounces unsweetened chocolate, chopped — provides deep chocolate flavor and structure.
4 large eggs — beaten with sugar to build lift and richness.
1 3/4 cups sugar — sweetens and helps create a tender crumb and shiny top.
1 1/2 teaspoons vanilla extract — rounds the chocolate flavor; add at the end of mixing the batter.
3/4 cup all-purpose flour — just enough to hold the brownies without making them cakey.
1 cup semi-sweet chocolate chips — stirred into the batter for pockets of melty chocolate.
1/2 cup butter, softened — for a smooth, spreadable creme de menthe frosting.
4 cups powdered sugar — gives the frosting body and sweetness; add gradually to avoid a powder cloud.
3 tablespoons green creme de menthe — the minty flavor that defines the frosting; pour in gradually and taste.
3 to 4 tablespoons half-and-half — thins the frosting to a spreadable consistency; use 3 and add the 4th if needed.
1/2 cup mini chocolate chips — stirred into the frosting for texture and bursts of chocolate.

The Essentials

Start by reading the ingredient list and laying everything out. The recipe uses two chocolate components: unsweetened chocolate melted with butter for the batter base, and semi-sweet chips folded into that batter. The frosting is a classic butter-and-powdered-sugar buttercream flavored with creme de menthe and studded with mini chips.

Plan time for cooling: the brownies must be completely cool in the pan before you frost them. That means build downtime into your prep—bake first, clean up and prep frosting tools while the brownies cool, then finish with the frosting and slicing.

Equipment is simple: a heavy-bottomed saucepan for melting chocolate, a reliable whisk or mixer, a 13x9x2-inch metal baking pan (buttered), and an electric mixer for the frosting. I list extra gear below but nothing exotic is required.

Directions: Brownies with Creme de Menthe-Chocolate Chip Frosting

Preheat oven to 350°F (175°C). Butter a 13x9x2-inch metal baking pan.
In a heavy-bottomed saucepan over low heat, combine 1 1/2 sticks butter and 4 ounces chopped unsweetened chocolate. Stir constantly until melted and smooth. Remove from heat and let cool for 3–5 minutes.
In a large bowl, whisk together 4 large eggs and 1 3/4 cups sugar until pale yellow and slightly thickened, about 3 minutes.
Gradually whisk the warm chocolate mixture into the egg-sugar mixture until evenly combined (add slowly so the eggs do not cook).
Add 3/4 cup all-purpose flour and stir just until incorporated; do not overmix.
Stir in 1 1/2 teaspoons vanilla extract and 1 cup semi-sweet chocolate chips. Spread the batter evenly in the prepared pan and smooth the top.
Bake for about 25 minutes, or until the edges are set and a toothpick inserted near the center comes out with a few moist crumbs (not wet batter). Remove from oven.
Cool the brownies completely in the pan on a wire rack before frosting.
For the frosting, beat 1/2 cup softened butter with an electric mixer until creamy.
Gradually add 4 cups powdered sugar, 3 tablespoons green creme de menthe, and 3 tablespoons half-and-half. Beat until smooth; if the frosting is too thick, add the remaining tablespoon of half-and-half and beat until you reach spreadable consistency.
Stir 1/2 cup mini chocolate chips into the frosting.
Spread the frosting evenly over the cooled brownies. Slice and serve.

Why This Brownies with Creme de Menthe-Chocolate Chip Frosting Stands Out

The base is classic—melted unsweetened chocolate plus butter gives a rich, glossy batter that sets into fudgy, moist brownies. The egg-and-sugar whisking step creates lift and that desirable crackly top. Then there’s the frosting: creme de menthe brings a clean, cooling mint note that cuts through the chocolate without overwhelming it.

Two textural touches push this past ordinary brownies: semi-sweet chips in the batter create pockets of molten chocolate, and mini chips in the frosting add a little crunch and contrast against the silky buttercream. It’s more sophisticated than a boxed mix but still entirely achievable on a weekday evening.

Flavor-Forward Alternatives

Swap the creme de menthe for peppermint extract if you prefer a sharper mint punch; use sparingly since extracts are concentrated.
Use dark chocolate chips in the batter for a slightly more bitter, cocoa-forward brownie.
Stir a tablespoon of instant espresso or brewed espresso into the melted chocolate to deepen chocolate flavor without making the brownies taste like coffee.
For an adult twist, replace part of the creme de menthe with a splash of peppermint liqueur—add cautiously and taste as you go.

Must-Have Equipment

13x9x2-inch metal baking pan — the recipe is written for this size and thickness for even bake.
Heavy-bottomed saucepan — prevents burning when melting chocolate and butter together.
Electric mixer — makes frosting smooth and light; you can beat by hand but it takes longer.
Wire rack — for cooling brownies completely before frosting.
Rubber spatula — for folding chips and scraping the pan cleanly.

Frequent Missteps to Avoid

Adding the melted chocolate to the eggs too quickly. The directions say to add it gradually; do so to avoid scrambling the eggs.
Overmixing after adding flour. Stir just until incorporated—overworking the gluten leads to cakier brownies, not fudgy ones.
Frosting warm brownies. If you frost before the brownie is fully cool, the frosting will melt and slide off.
Using cold butter for the frosting. Softened butter gives a smooth emulsion; cold butter leaves lumps and takes longer to whip.
Ignoring the “few moist crumbs” test. A toothpick that comes out with wet batter means underbaked; continue baking in short increments if needed.

Better-for-You Options

If you want a lighter take without changing the structure of the recipe, here are a few approaches that keep the core intact:

Trim portion sizes: slice the 13×9 pan into smaller squares so each serving is less calorie-dense.
Choose semi-sweet chips with a higher cacao percentage for slightly less sugar per bite; they’ll deliver more chocolate flavor with less sweetness.
Use reduced-fat dairy in the frosting if you want to shave richness, understanding it will slightly change mouthfeel.
Swap half-and-half for milk if needed, but remember it will affect frosting stability and flavor slightly.

Insider Tips

Melting the Chocolate

Use the lowest heat possible and stir constantly. A heavy-bottomed pan evens heat distribution—this prevents scorching and grainy chocolate. Remove from heat a few degrees before fully smooth; residual heat finishes the job.

Whisking Eggs and Sugar

Whisk until the mix lightens in color and thickens slightly—about three minutes by hand is listed in the directions; an electric mixer will cut that time. This aeration contributes to a tender top crust and balances density.

Frosting Consistency

Start with 3 tablespoons of half-and-half as directed, then add the optional fourth tablespoon only if the frosting is too stiff. Beat thoroughly after each addition to judge consistency—powdered sugar can hide lumps if not fully incorporated.

Slicing Neatly

Chill the frosted brownies briefly to set the frosting, then slice with a sharp knife wiped between cuts for cleaner edges.

Save It for Later

Store brownies covered at room temperature if you plan to eat them within a day. For longer keeping, refrigerate in an airtight container. If you need to freeze, wrap the cooled and unfrosted (or individually wrapped frosted) pieces tightly to protect texture and flavor; thaw gently before serving. Always return cut brownies to a flat position to prevent frosting from sticking to the container lid.

Reader Q&A

Q: Can I make the brownies ahead?
A: Yes. Bake and cool fully, then either frost the day you plan to serve or refrigerate un-frosted brownies and frost later. Frosting freshly spread tastes brightest.

Q: My frosting is too thick—what now?
A: The directions anticipate this: add the remaining tablespoon of half-and-half and beat until spreadable. Add small increments and beat between additions to avoid over-thinning.

Q: Can I use a different mint flavor?
A: You can substitute peppermint extract or a different mint liqueur, but adjust amounts—extracts are more concentrated. Taste as you go, especially with alcoholic options.

Q: Why are my brownies cakey?
A: Likely overmixing after adding flour or using too much flour. Stir just until incorporated and measure flour accurately—spoon it into the cup and level; don’t pack it.

Before You Go

If you make these, I’d love to hear how you adjusted them. Did you prefer a stronger mint or more chocolate? Did you try any of the alternatives? Post a photo and notes where you found this recipe so others can learn from your tweaks.

Simple habits—melting gently, folding carefully, and waiting for the brownies to cool—make the difference between good and great. Follow the steps exactly for reliably fudgy brownies and a frosting that keeps every bite bright and minty. Happy baking.

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