Banana brownies are a great way to use up leftover bananas (especially when you're sick of banana bread!). My recipe uses just one bowl and takes only 15 minutes to prep.
Preheat oven to 350F (175C) and line a 9x9” square baking pan with parchment paper. Set aside.
In a large microwave-safe mixing bowl, combine butter and chopped chocolate and heat in the microwave in 10-second intervals, stirring well in between, until butter and chocolate are completely melted and mixture is smooth.
10 Tablespoons unsalted butter, 4 oz semi-sweet chocolate
Add cocoa powder and whisk until smooth.
½ cup natural cocoa powder
Add sugar, mashed banana, eggs, vanilla and salt and stir until well combined.
1 ¼ cups granulated sugar, ½ cup mashed banana, 2 large eggs, 1 teaspoon vanilla extract, ½ teaspoon table salt
Stir in flour, mixing until combined. Add chocolate chips, reserving a few for the top if desired, and stir until chips are evenly distributed through the batter.
⅔ cup all-purpose flour, ¾ cup semi-sweet chocolate chips
Spread batter evenly into prepared baking pan and scatter reserved chocolate chips over the top of the brownies.
Transfer to center rack of 350F (175C) oven and bake for 30-33 minutes and a toothpick inserted in the center comes out clean or with moist fudgy crumbs (not wet batter)..
Allow to cool completely in pan before slicing and enjoying (they tend to fall apart when still warm!).
Notes
Chocolate
I like to use a semisweet chocolate bar, but if you prefer to use chocolate chips you will need ⅔ cup of chocolate chips.
Baking pan
If using a glass baking dish note the brownies will take longer than indicated to bake completely.
Storing
Store covered or in an airtight container at room temperature for up to 3 days.