A rich, fudgy brownie with a creamy mint layer and chocolate topping

A Little Kitchen Story

There are some desserts that feel extra special the moment you pull them out of the fridge, slice into them, and see those beautiful layers. These mint Oreo brownies are definitely one of those treats.

The bottom layer is a deep, chocolatey brownie that stays wonderfully fudgy. Right on top sits a smooth mint cream layer that reminds many people of those classic mint chocolate candies. Then everything gets finished with a glossy chocolate topping.

When you slice into the pan you get three perfect layers and a bite that is rich, minty, and completely irresistible.

These are especially fun around the time of St. Patrick’s Day, but honestly they disappear just as quickly any time of year.

If you love the flavor combination of chocolate and mint, this is the kind of dessert that people will ask you to bring again and again.

Triple Layer Fudgy Mint Oreo Brownies

Yield: about 16 brownies
Prep time: 25 minutes
Bake time: about 25 minutes
Chill time: about 2 hours

Ingredients

Brownie Layer

• 1 cup unsalted butter, melted
• 2 cups granulated sugar
• 1 cup unsweetened cocoa powder
• 4 large eggs
• 1 tablespoon vanilla extract
• 1 cup all purpose flour
• 1 teaspoon salt
• about 18 Mint Oreos, roughly chopped

Mint Cream Layer

• ½ cup unsalted butter, softened
• 2 cups powdered sugar
• 1 tablespoon milk
• ½ teaspoon peppermint extract
• green food coloring, optional

Chocolate Topping

• 1 cup semisweet chocolate chips
• 2 tablespoons butter

Step By Step Instructions

1. Prepare the pan

Preheat your oven to 350°F (175°C).

Line a 9 x 13 inch baking pan with parchment paper or foil and lightly grease it. This makes lifting the brownies out much easier later.

2. Make the brownie batter

In a large bowl combine the melted butter, sugar, and cocoa powder. Stir until smooth and glossy.

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

Now gently mix in the flour and salt until just combined.

Fold in the chopped Mint Oreos. They add little pockets of chocolate and mint throughout the brownie layer.

3. Bake the brownies

Spread the batter evenly in the prepared pan.

Bake for about 25 minutes, or until the center is just set. The brownies should still look slightly soft in the middle.

Let them cool completely before adding the next layer.

This step is important so the mint layer does not melt.

4. Make the mint cream layer

In a medium bowl beat together the softened butter and powdered sugar until smooth.

Add the milk and peppermint extract and continue mixing until creamy.

If you want that festive mint color, stir in a small drop of green food coloring.

Spread the mint mixture evenly over the cooled brownie layer.

Place the pan in the refrigerator for about 30 minutes so the mint layer firms up.

5. Prepare the chocolate topping

In a microwave safe bowl melt the chocolate chips and butter together in short bursts, stirring every 20 seconds until smooth.

Pour the melted chocolate over the mint layer and spread gently to cover the surface.

Return the pan to the refrigerator for about 1 hour until the chocolate sets.

6. Slice and serve

Once fully chilled, lift the brownies out of the pan and slice into squares.

Use a sharp knife and wipe it clean between cuts to keep those pretty layers neat.

Now you are ready to enjoy a rich, minty, chocolate filled treat.

Helpful Baking Tips

Use good cocoa powder
The brownie layer relies heavily on cocoa for flavor, so a good quality cocoa powder makes a noticeable difference.

Cool completely before layering
If the brownies are still warm the mint layer will melt and become messy.

Chill before slicing
Cold brownies cut much more cleanly and show off those beautiful layers.

For extra mint flavor
Add a few chopped mint Oreos on top of the brownie batter before baking.

Easy Substitutions

If you want to tweak the recipe a little, here are some simple swaps.

Regular Oreos
If mint Oreos are not available, use regular Oreos and increase the peppermint extract slightly.

Dark chocolate topping
Dark chocolate chips work beautifully if you prefer a deeper chocolate flavor.

Mint extract vs peppermint
Peppermint extract gives a classic mint flavor, but mint extract can also work if that is what you have.

How To Make These Brownies Vegan

You can absolutely make a plant based version of this dessert.

Butter substitute

Use a vegan butter stick in equal amounts.

Egg substitute

Replace the 4 eggs with one of the following:

• 4 flax eggs
• 1 cup unsweetened applesauce

Cookies

Look for a dairy free sandwich cookie similar to Oreos. Many grocery stores carry them.

Chocolate chips

Use dairy free chocolate chips.

The result is still rich, chocolatey, and perfectly minty.

Storage Tips

Room Temperature

Brownies can sit in an airtight container for about 2 days.

Refrigerator

For best texture store them in the fridge for up to 5 days.

Freezer

These freeze surprisingly well.

Slice the brownies and wrap them individually. Freeze for up to 2 months and thaw in the refrigerator.

Serving Ideas

These brownies are perfect for:

St. Patrick’s Day dessert tables
potlucks and parties
afternoon coffee treats
chocolate lovers

A small square goes a long way because they are wonderfully rich.

Frequently Asked Questions

Can I make these ahead of time?

Yes. In fact they taste even better the next day after the layers have fully set.

Why are my brownies crumbly?

They were likely baked a little too long. Pull them out when the center still looks slightly soft.

Can I use a smaller pan?

Yes. An 8 x 8 pan will give thicker brownies but they may need a few extra minutes of baking time.

Do these taste very minty?

The mint layer has a gentle peppermint flavor that balances nicely with the chocolate.

Can I add extra Oreos?

Absolutely. More cookies means more crunch and chocolate flavor.