Banana Brownie Fudgy Chocolate Dessert Recipe 2026

Banana brownie is a sweet treat that combines the smoothness of a classic chocolate brownie with the juiciness of ripe bananas, which also add a delicious touch of sweetness without being cloying. To make this surprising dessert, we started with our favorite brownie recipe without modifying it much, just enough to reduce the sugar and add the banana. As you'll see in the following step-by-step instructions, it's very easy to prepare.

This time, we've added chopped walnuts to the batter for a crunchy texture, although you could substitute them with another nut, such as hazelnuts, which also work wonderfully. If you want to make this brownie gluten-free, simply replace the wheat flour with cornstarch. Since it uses so little flour, the result will be practically the same.

You might be surprised by the short baking time and low temperature, but we did it this way to ensure it's very moist. Since every oven is different, you'll know it's done when you see the edges are dry and the center is still slightly undercooked. Once it has cooled and chilled in the refrigerator, it will have the perfect texture.

We will serve the banana brownie after it has chilled. We recommend cutting it into portions with a plastic knife, as this makes it easier to cut. You can serve it as is or with a few slices of banana.

Recipe Information

• Preparation time: 20 minutes
• Cooking time: 25 minutes
• Total time: 45 minutes (plus cooling time)
• Servings: 9
• Category: Pastry
• Cuisine: International
• Calories per serving (kcal): 333

Banana Brownie Ingredients

• 150g dark chocolate (chips or chopped)
• 75g butter
• 85g sugar
• 3 medium eggs at room temperature
• 1 tsp vanilla extract
• 3 ripe bananas
• 30g all-purpose flour
• 35g unsweetened cocoa powder
• 1 pinch of salt
• 75g walnuts

Utensils needed

• 23cm square detachable mold

How to make banana brownies

First, preheat the oven to 160°C (325°F). Microwave 150g of dark chocolate (chips or chopped) with 75g of butter for 30 seconds and stir with a spatula to combine.

We add 85g of sugar and beat the mixture with a whisk.

Add 3 medium eggs one at a time, meaning don't add the next one until the previous one is fully incorporated with the whisk. Then add 1 teaspoon of vanilla extract and whisk to combine.

We crush or mash 3 ripe bananas and add them to the previous mixture.

Add 30g of wheat flour, 35g of unsweetened cocoa powder, and a pinch of salt. At this point, whisk just until all the ingredients are combined.

Add 75g of roughly chopped walnuts and stir to incorporate them into the mixture.

We place the banana brownie mixture in a 23 cm square mold lined with baking paper.

We bake the banana brownie for 25 minutes at 160ºC with heat above and below.

We let the brownie cool in the pan and refrigerate it overnight. Once it's cold, we unmold it and serve it cut into slices.

Easy-to-prepare summary

1. Heat the chocolate and butter in the microwave.
2. Add the sugar and mix.
3. Add the eggs one at a time and the vanilla extract.
4. Add the mashed bananas.
5. Add the flour, cocoa powder, and salt.
6. Add the chopped walnuts.
7. Pour the mixture into the pan.
8. Bake the banana brownie for 25 minutes at 160°C (325°F). Let it cool, unmold, and serve.