BYU Chocolate Mint Brownies Recipe: Peppermint Oil Secret for Bold Minty Kick

This BYU chocolate mint brownies recipe delivers the perfect balance of rich chocolate and refreshing peppermint—just like the iconic treats from Brigham Young University. The secret lies in using peppermint oil for an intense minty kick that stays vibrant even after baking.

I've perfected this recipe over years of testing, ensuring every bite has that signature BYU flavor without being overpowering.

The recipe begins with a classic brownie base—fudgy, dense, and packed with cocoa powder—before incorporating the mint through a simple yet effective technique. Instead of mint extract, which can taste artificial, I use peppermint oil for a cleaner, more authentic flavor.

The result? Brownies that taste like a dessert from a university cafeteria but with restaurant-quality depth.

By the time these brownies emerge from the oven, you'll have a pan of fudgy, crackly-topped squares with pockets of melted chocolate and a bright mint aroma that lingers. The peppermint oil infuses the entire batch, not just the surface, so every bite delivers that signature BYU flavor.

They're perfect for holidays, potlucks, or satisfying a late-night sweet tooth.

Optional garnishes like crushed candy canes or fresh mint leaves add visual appeal, but the real magic is in the flavor—bold, balanced, and impossible to resist. Let's get baking!

Ingredients for byu chocolate mint brownies

Peppermint oil transforms classic brownies into BYU's signature flavor—rich chocolate meets vibrant mint.

The peppermint oil is non-negotiable for that authentic BYU flavor—Mountain Rose Herbs or Frontier Co-op carry food-grade quality. For the cocoa powder, Valrhona or Ghirardelli deliver restaurant-level richness. Butter should be unsalted and cold when cubed—this ensures even melting and prevents overmixing. If you're using supermarkets, Land O'Lakes or Plugrá are reliable choices. The crushed candy canes add both visual appeal and extra mint flavor, but they're optional if you want to keep the brownies purely chocolate-mint.

No peppermint oil? Mint extract at double the amount works in a pinch, though the flavor won't be as clean. Substitute Dutch-process cocoa with natural cocoa powder, but reduce by 1 tbsp to account for the acidity difference. For a gluten-free version, swap the all-purpose flour for a 1:1 gluten-free blend. The heavy whipping cream can be omitted if you prefer a denser texture, but adding it creates that signature fudgy BYU consistency. Fresh mint leaves should be added just before serving to preserve their vibrant aroma—Trader Joe's or local farmers' markets are great sources for fresh, aromatic mint.

Store brownies in an airtight container at room temperature for up to 5 days, though they're best enjoyed within 2 days for peak freshness. For longer storage, wrap individually in plastic and freeze for up to 3 months. The peppermint flavor intensifies slightly when reheated—microwave for 10-15 seconds to restore that warm, comforting aroma. Garnishes like crushed candy canes or mint leaves should be added fresh before serving to maintain their visual appeal and vibrant scent.

Step-by-step instructions for BYU chocolate mint brownies

Here's the precise method for fudgy, intensely minty brownies with that signature BYU peppermint kick.

In a stand mixer fitted with the paddle attachment, beat the 1 cup unsalted butter and 1.5 cups granulated sugar on medium speed for 3-4 minutes. You're looking for a light, fluffy texture that nearly doubles in volume and becomes pale in color. This creaming process incorporates air, which creates the signature tender crumb and helps distribute the peppermint flavor evenly throughout.

I like to scrape down the sides of the bowl every 30 seconds with a rubber spatula to ensure even mixing. The butter should be completely melted and smooth—this is your base for building rich, fudgy texture. If you're using superfine sugar, the mixture will come together even more smoothly, but regular granulated sugar works fine with slightly longer mixing time.

Add the 2 whole large eggs one at a time, mixing on low speed for 30 seconds after each addition until fully incorporated. Then add the 1 teaspoon vanilla extract and 0.25 teaspoon peppermint oil, mixing just until combined. The peppermint oil is where the magic happens—this is what gives these brownies that signature BYU intensity. I find it's best to add it last so the flavor doesn't degrade from prolonged mixing.

Here's the thing—don't overmix after adding the peppermint oil. You want to distribute it evenly without developing gluten in the flour we'll add next. The mixture should be smooth but still slightly thick. If it looks too thin, that's okay—we'll balance it out with the dry ingredients.

In a separate bowl, whisk together the 0.75 cup unsweetened cocoa powder, 0.75 cup all-purpose flour, 0.5 teaspoon salt, and 0.25 teaspoon baking powder. Sift the dry ingredients directly into the wet mixture and mix on low speed for 30-45 seconds until just combined. You should still see some flour streaks—this prevents tough brownies.

Remove the bowl from the mixer and gently fold in the 1 cup semi-sweet chocolate chips and 0.5 cup heavy whipping cream (if using) using a silicone spatula. The cream adds richness and helps create that signature fudgy texture. Fold just until evenly distributed—don't overwork the batter or you'll develop gluten that makes the brownies tough.

Gently fold in the 0.25 cup crushed candy canes and 0.25 cup chopped fresh mint leaves using a spatula. This is where the brownies get their signature holiday flavor profile. The candy canes add sweetness and crunch, while the fresh mint leaves provide a bright, aromatic contrast to the rich chocolate. Be careful not to overmix—just enough to distribute these ingredients evenly throughout the batter.

Here's a pro tip: If you're worried about the mint leaves being too strong, you can finely chop them or even pulse them in a food processor first. The candy cane pieces should be about ¼-inch in size for good texture contrast. The batter will be thick but still pourable—this is perfect for achieving that fudgy, dense texture.

Preheat your oven to 350°F and line an 8x8-inch baking pan with parchment paper, leaving an overhang on the sides for easy removal. Pour the batter into the prepared pan and smooth the top with a spatula. For extra visual appeal, I like to sprinkle additional crushed candy canes on top before baking.

Bake for 25-30 minutes until a toothpick inserted in the center comes out with moist crumbs (not wet batter). The edges should be set but the center should still look slightly underdone—this ensures maximum fudginess. Don't overbake, or you'll lose that signature tender texture. The brownies will continue cooking slightly as they cool in the pan.

Remove the pan from the oven and let the brownies cool completely in the pan for 1 hour before slicing. This resting period is crucial—it allows the brownies to set properly and makes for cleaner slices. I know it's tempting to cut into them while they're still warm, but trust me on this one.

Once cooled, use the parchment paper overhang to lift the brownies out of the pan and cut into 16 equal squares. Serve at room temperature for the best texture contrast between the fudgy interior and the crisp edges. These brownies keep well in an airtight container at room temperature for up to 5 days, though I doubt they'll last that long in your house!

Dietary considerations for byu chocolate mint brownies

Gluten-Free Adaptation

For a gluten-free version, replace the 0.75 cup all-purpose flour with 0.75 cup gluten-free 1:1 baking flour like Bob's Red Mill or King Arthur. These blends mimic the structure of regular flour while keeping the fudgy texture intact.

I've tested this substitution and found it works beautifully—just ensure your blend includes xanthan gum for proper binding. 🌱

Lower Sugar Options

To reduce sugar, swap 1.5 cups granulated sugar with 1 cup monk fruit sweetener (like Lakanto) or 1 cup coconut sugar. These alternatives maintain moisture without spiking blood sugar as dramatically.

I recommend reducing the baking time by 2-3 minutes since these sweeteners can slightly alter the brownie's density. Taste test as you go!

Dairy-Free Substitutes

The butter and heavy cream can be easily replaced with dairy-free alternatives. Use 1 cup dairy-free butter (like Miyoko's) and 0.5 cup full-fat coconut milk for richness.

For chocolate chips, opt for Enjoy Life brand (they're dairy-free and allergy-friendly). The texture remains fudgy, though the flavor profile becomes slightly lighter—perfect for those with lactose sensitivities. ❄️

Nut-Free Considerations

If nut allergies are a concern, skip the chocolate chips and replace them with 1 cup dairy-free chocolate chunks (like Pascha brand) or 1 cup dairy-free white chocolate chips.

These alternatives maintain the same creamy pockets without nuts. I also recommend checking labels on peppermint oil—some brands process in nut-free facilities, but Mountain Rose Herbs confirms their oils are nut-free.

Vegan Adaptations

For a fully vegan version, replace the 2 eggs with 2 flax eggs (2 tbsp ground flaxseed + 6 tbsp water, mixed and rested for 5 minutes). Use dairy-free butter and coconut milk as mentioned earlier.

The texture will be slightly denser but still rich and fudgy. I've found that adding 1 tbsp apple cider vinegar to the batter helps balance the flavors beautifully. 💚

Peppermint Sensitivity

If peppermint oil feels too intense, reduce it to 0.125 tsp and boost the vanilla extract to 1.5 tsp for balance. For a gentler mint flavor, replace the peppermint oil with 0.5 tsp mint extract (though the flavor won't be as clean).

You can also add 0.25 tsp almond extract for a subtle sweetness that complements the chocolate without overpowering it. 🍃

Frequently asked questions