Dark Chocolate Banana Brownies with Chocolate Glaze

I’ll be honest—brownies aren’t always my go-to dessert. I’m usually more of a cookie or cake mom. But these dark chocolate banana brownies completely changed my mind. They’re rich, deeply chocolatey, and perfectly moist, thanks to a couple of overripe bananas hiding in the batter.

My kids love them, I love that they use up bananas that would otherwise end up in the compost, and everyone wins. 

 

If you’re worried about this brownie being too sweet, you can skip the chocolate glaze altogether or opt to drizzle a little glaze on individual brownies instead. I’ve done it both ways, and they’re delicious no matter what.

 

If you’re burned out on banana bread and muffins to use up extra bananas (same here, my friend), this recipe is the perfect way to switch things up while still using what you have on hand.

 

Why You’ll Love These Dark Chocolate Banana Brownies

• Rich, fudgy texture with real dark chocolate
• Naturally moist from ripe bananas
• These make great banana bread or banana muffin alternatives
• Easy, pantry-friendly ingredients
• Customizable sweetness with an optional glaze

These brownies feel a little indulgent—but still practical enough for a weekday bake.

Ingredients for Dark Chocolate Banana Brownies with Chocolate Glaze 

For the Brownies

• ¾ cup unsalted butter
• ¾ cup brown sugar
• 1 cup dark chocolate (chips or chopped bar)
• 1 teaspoon vanilla extract
• 2 eggs
• 2 ripe bananas, mashed
• ½ cup flour
• 2 tablespoons cocoa powder

For the Chocolate Glaze 

• ¾ cup powdered sugar
• 2 tablespoons cocoa powder
• 1 teaspoon vanilla extract
• 3 tablespoons hot water

How to Make Dark Chocolate Banana Brownies

1. Prepare the Oven & Pan

Preheat your oven to 350°F. Lightly grease a 9-inch square glass baking dish and set aside.

2. Mix the Banana Base

In a small bowl, fully mash the bananas. Stir in the eggs and vanilla until smooth. Take a minute here to really break down the bananas—this helps keep the brownies fudgy instead of chunky.

3. Combine the Dry Ingredients

In another small bowl, stir together the flour and cocoa powder until evenly blended.

4. Melt the Chocolate Mixture

In a medium saucepan over low heat, melt the butter, brown sugar, and dark chocolate together. Stir constantly and remove from heat as needed so the chocolate doesn’t scorch.

5. Bring the Batter Together

To avoid scrambling the eggs, stir a couple of tablespoons of the warm chocolate mixture into the banana mixture first. Then slowly add the remaining chocolate mixture and mix well.
Fold in the flour and cocoa mixture until just combined.

6. Bake

Pour the batter into your prepared pan and bake for about 35 minutes, or until the center is set but still soft.

Chocolate Glaze Instructions

While the brownies are baking, whisk together the powdered sugar and cocoa powder. Add vanilla and hot water, stirring until smooth and drizzle-ready.

Once the brownies are out of the oven, pour the glaze over the warm brownies or drizzle individually. I like to let the glaze set for a few minutes before slicing—it gives that bakery-style finish without the mess.

Mom Tip 

These brownies taste even better the next day. If you can hide a few squares (I believe in you), they’re perfect for lunchboxes, after-school snacks, or a quiet late-morning treat with a cup of coffee.

If you’re staring at overripe bananas and thinking “not another loaf of banana bread”, these dark chocolate banana brownies are your answer. Rich, cozy, and kid-approved—this is one recipe you’ll come back to again and again.