These brownies are the kind I make when friends drop by unexpectedly and I want something that looks indulgent but comes together without drama. They have a thin, crackly top, a tender, fudgy middle, and a confident hit of peppermint. Using buckwheat flour keeps them gluten-free while preserving a rich, chocolatey texture that isn’t grainy or cakey.

I test recipes until they behave reliably, and this one does: measured ingredients, a few simple techniques, and a short bake time. The batter is forgiving; you’ll notice how quickly the melted butter (or coconut oil) and sugar marry into a glossy base for the eggs and chocolate. Mint is bold here—two teaspoons of peppermint extract give a clear mint profile without masking the cocoa.

If you like a denser, chewier brownie, bake to the lower time listed; if you prefer a slightly more set edge, take it to the upper end. Either way, let them cool completely before slicing. Cooling is the secret to clean pieces and the best texture.

Ingredient Checklist

1 cup buckwheat flour — for a gluten-free version; use whole wheat flour only if you don’t need GF.
¾ cup Dutch-process cocoa powder — sift if lumpy; gives deeper chocolate flavor than natural cocoa.
¼ teaspoon salt — balances sweetness and brightens chocolate.
¾ cup + 1 tablespoon unsalted butter or coconut oil — melted and cooled slightly; fat gives fudgy texture and carries flavor.
1 ½ cups granulated sugar — provides structure and that desirable crackly top.
1 teaspoon pure vanilla extract — rounds the peppermint and chocolate.
2 teaspoons peppermint extract — the mint punch; measure carefully, it’s potent.
3 large eggs — room temperature; add richness and help set the brownies.
1 ¼ cups semi-sweet chocolate chips — 1 cup folded into batter and ¼ cup reserved for topping (or other add-ins you prefer).

Gluten-Free Mint Chocolate Chip Brownies Made Stepwise

Preheat the oven to 350°F (175°C). Line an 8″x8″ baking pan with parchment paper, leaving an overhang for easy removal.
In a medium bowl, whisk together 1 cup buckwheat flour (or whole wheat flour), 3/4 cup Dutch-process cocoa powder (sift if lumpy), and 1/4 teaspoon salt. Set the dry mixture aside.
Melt 3/4 cup plus 1 tablespoon unsalted butter or coconut oil and let it cool slightly. In a large bowl, stir the cooled melted fat with 1 1/2 cups granulated sugar, 1 teaspoon vanilla extract, and 2 teaspoons peppermint extract until combined.
Add the 3 large room-temperature eggs to the wet mixture one at a time, stirring after each egg just until incorporated. Do not overmix.
Add the dry ingredients to the wet ingredients and stir gently until almost no streaks of flour remain. Mix only until just combined.
Fold in 1 cup of the 1 1/4 cups semi-sweet chocolate chips (reserve 1/4 cup for topping).
Pour the batter into the prepared pan and smooth the top with a spatula. Sprinkle the reserved 1/4 cup chocolate chips evenly over the batter, if desired.
Bake for 16–20 minutes, until a thin crust forms on top and the center appears set. A toothpick inserted into the center should come out with a few moist crumbs (not wet). The brownies will continue to firm up as they cool.
Let the brownies cool completely in the pan. Use the parchment overhang to lift them from the pan, then cut and serve. Store covered at room temperature for up to 4 days.

Why This Gluten-Free Mint Chocolate Chip Brownies Stands Out

These brownies strike a balance between fudgy and tender without relying on starch-heavy mixes. Buckwheat flour gives depth—it’s naturally gluten-free and adds an almost nutty undertone that complements dark cocoa. The peppermint extract is calibrated to be present but not overpowering, so the chocolate stays central.

The method keeps mixing to a minimum. That’s deliberate. Overmixing gluten-free batters (or any batter) can introduce toughness or collapse. The melted butter plus sugar creates a glossy matrix that traps eggs and chocolate, helping the brownies set up with a glossy top and moist interior.

What to Use Instead

Butter or coconut oil: Both are allowed in the recipe; use coconut oil for a dairy-free version if you like the faint coconut scent. The recipe provides the exact amount—use as written.
Buckwheat flour: The recipe lists whole wheat flour as the only non-GF alternative; stick to that if you are not avoiding gluten. Do not substitute other flours unless you understand how they change hydration and texture.
Semi-sweet chocolate chips: You can swap in a different chip type (dark or milk) if you prefer, but keep the total to 1 1/4 cups as specified.

Kitchen Gear Checklist

8″x8″ baking pan — lined with parchment for easy removal.
Medium mixing bowl — for dry ingredients.
Large mixing bowl — for wet ingredients and assembly.
Measuring cups and spoons — accurate sugar, flour, and extract measuring keeps results consistent.
Spatula — for folding and smoothing the batter.
Whisk — for whisking dry ingredients to remove lumps.
Toothpick — for checking doneness quickly.

Avoid These Mistakes

Skipping the parchment overhang: You’ll wrestle with removing brownies if you don’t leave an overhang for lifting.
Overmixing after eggs: Stir gently after adding eggs and again when combining dry ingredients. Overworking the batter creates a denser, tougher texture.
Measuring cocoa and flour improperly: Dutch-process cocoa and buckwheat flour can compact. Spoon into the cup and level, don’t scoop directly with the measuring cup.
Ignoring room temperature eggs: Cold eggs can cause the melted fat to seize or lump. Let them come to room temperature first.
Baking too long: These brownies bake quickly. Follow the 16–20 minute window and check early. You want moist crumbs on the tester.

Tailor It to Your Diet

Gluten-free is already handled by the buckwheat flour. For dairy-free, use refined coconut oil so you don’t get coconut flavor if you’d rather not. If you need vegan, this recipe uses eggs and cannot be swapped without changing structure—egg replacements will alter texture and rise significantly, so follow a tested vegan brownie recipe instead.

To reduce sugar, be cautious: sugar contributes to texture and the shiny crust. Cutting more than 10–15% will change the final product. If you need lower sugar, consider reducing by a small amount and accept a different crust and mouthfeel.

Notes from the Test Kitchen

When I tested these, the two biggest levers were bake time and the temperature of the melted fat. If the butter is too hot when combined with sugar and eggs, it will cook portions of the eggs and break the emulsion. Let the butter cool until it’s warm to the touch but still liquid.

I also tested both butter and coconut oil. Butter gives a richer mouthfeel and a slightly faster set. Coconut oil works fine and keeps the flavor neutral if you choose refined, but the texture can feel slightly softer at room temperature. Either is listed in the recipe so pick what suits your needs.

Finally, I recommend reserving the 1/4 cup chocolate chips for the top. They make the surface look finished and give a textural contrast when cooled. If you fold them all in, you still get chocolate pockets, but the top won’t have those pretty chips.

Cooling, Storing & Rewarming

Cooling

Let the brownies cool completely in the pan before attempting to cut. Cooling lets the internal steam redistribute and the structure firm up. If you try to slice hot brownies you’ll get ragged edges and a gooey center that resettles messily.

Storing

Store covered at room temperature for up to 4 days, as the directions state. Use an airtight container or wrap tightly in plastic to prevent drying. If you live somewhere hot and used butter, refrigeration will extend shelf life but can firm the texture; let them come back to room temperature before serving for best flavor.

Rewarming

Warm a slice for 8–12 seconds in the microwave to bring back a slightly melty interior, or place on a baking sheet in a 300°F (150°C) oven for 5–7 minutes. Don’t overdo it; you want warmth, not drying.

FAQ

Q: Can I use a different gluten-free flour blend?
A: This recipe is written and tested with buckwheat flour. Other blends vary in absorption and binding. If you substitute, expect to tweak liquid or mixing and to potentially lose the same texture.

Q: My brownies came out cakey. Why?
A: Likely overmixed or baked too long. Mix until just combined and check at the earlier end of the bake window. Cakey texture often comes from too much air being incorporated or overbaking.

Q: The peppermint is too strong. Can I reduce it?
A: Yes. Start with 1 teaspoon peppermint extract and add more to taste next time. Extract potency varies by brand, so adjust gradually.

Q: Can I freeze these?
A: Yes. Wrap tightly in plastic and foil, or freeze in an airtight container for up to 2 months. Thaw at room temperature and warm gently if desired.

Bring It Home

These gluten-free mint chocolate chip brownies are straightforward, reliably good, and built on clear technique: measure, melt and cool the fat, combine gently, and watch the oven. They work for casual dessert duty and for sharing when you want something impressive without fuss.

Make them once and you’ll find the rhythm. The cooling step is not optional if you want neat squares. Serve them with cold milk or a scoop of vanilla ice cream. If you try a variation—different chips or a light sprinkle of flaky salt on top—take notes so you can repeat what you liked.

Happy baking. If you have questions about swaps or technique, tell me what you tried and I’ll help troubleshoot the next batch.

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Gluten-Free Mint Chocolate Chip Brownies

Fudgy, minty chocolate brownies made gluten-free with buckwheat flour (or use whole wheat for a non-GF version). Semi-sweet chocolate chips are folded into the batter with some reserved for the top.

Prep Time15

Cook Time20

Total Time35

Course: Dessert

Servings: 16 servings

Ingredients

1 cupbuckwheat flourfor a gluten-free version or whole wheat flour for a non-GF version
3/4 cupDutch-process cocoa powdersifted if lumpy
1/4 teaspoonsalt
3/4 cup+ 1 tablespoon unsalted butter or coconut oil*melted and cooled slightly
1 1/2 cupsgranulated sugar
1 teaspoonpure vanilla extract
2 teaspoonspeppermint extract
3 large eggsroom temperature
1 1/4 cupssemi-sweet chocolate chips or other add-ins

Instructions

Preheat the oven to 350°F (175°C). Line an 8"x8" baking pan with parchment paper, leaving an overhang for easy removal.
In a medium bowl, whisk together 1 cup buckwheat flour (or whole wheat flour), 3/4 cup Dutch-process cocoa powder (sift if lumpy), and 1/4 teaspoon salt. Set the dry mixture aside.
Melt 3/4 cup plus 1 tablespoon unsalted butter or coconut oil and let it cool slightly. In a large bowl, stir the cooled melted fat with 1 1/2 cups granulated sugar, 1 teaspoon vanilla extract, and 2 teaspoons peppermint extract until combined.
Add the 3 large room-temperature eggs to the wet mixture one at a time, stirring after each egg just until incorporated. Do not overmix.
Add the dry ingredients to the wet ingredients and stir gently until almost no streaks of flour remain. Mix only until just combined.
Fold in 1 cup of the 1 1/4 cups semi-sweet chocolate chips (reserve 1/4 cup for topping).
Pour the batter into the prepared pan and smooth the top with a spatula. Sprinkle the reserved 1/4 cup chocolate chips evenly over the batter, if desired.
Bake for 16–20 minutes, until a thin crust forms on top and the center appears set. A toothpick inserted into the center should come out with a few moist crumbs (not wet). The brownies will continue to firm up as they cool.
Let the brownies cool completely in the pan. Use the parchment overhang to lift them from the pan, then cut and serve. Store covered at room temperature for up to 4 days.

Equipment

8x8-inch Pan

Notes

Notes
* I prefer to use refined coconut oil, which has no coconut taste or smell. If you use unrefined coconut oil, these will likely have some coconut flavor to them.