Step 1

Preheat oven to 350°F (180°C).

Step 2

In a bowl, use a fork to mash the bananas. Add the sugar, ½ cup (115 g) of butter, and vanilla, and whisk until combined.

Step 3

Add the flour, salt, and cocoa powder, and whisk until fully incorporated.

Step 4

Use the remaining 1 tablespoon of butter to grease a 9x9-inch (23x23 cm) baking tray.

Step 5

Use the remaining 1 tablespoon of cocoa powder to dust every side of the baking tray.

Step 6

Pour batter into prepared baking dish.

Step 7

Use a spoon to add dollops of peanut butter on top of the batter. Use a butter knife to swirl the peanut butter into the brownie batter.

Step 8

Bake for 25-30 minutes, until center no longer jiggles when pan is shaken.

Step 9

Allow brownies to cool completely before cutting.

Step 10

Enjoy!