3tablespoonsmaple syrupoptional, for extra sweetness
1/4cupchocolate chipsoptional
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Method
Preheat oven to 350° Fahrenheit and line a 9x4-inch loaf pan with parchment paper, then grease the inside of the pan with oil or butter.
Mash the bananas in a large bowl until mostly smooth, then add in the peanut butter, cocoa powder, and maple syrup (if using). Mix everything together until fully combined.
Transfer the brownie batter to your prepared baking pan and top with chocolate chips (if using), then bake for 18-20 minutes or until the brownie are just set in the middle.
Remove the pan from the oven and let the brownies cool completely before slicing.