Preheat the oven to 350 degrees and spray a 9x9 baking pan with non-stick spray.
Using mixer, beat bananas until pureed.
Add the rest of the wet ingredients and mix until combined.
Add the dry ingredients, and whisk together for about a minute or two on medium speed.
Pour into prepared 9x9 baking pan and bake until the center has firmed, about 30-35 minutes.
After the brownies have cooled, prepare frosting or melted peanut butter/chocolate drizzles.
Peanut Butter Frosting
Using mixer, beat butter, peanut butter, vanilla, cream and salt together until well mixed. Add confectioners sugar and beat well until smooth and creamy. Frost brownies with a spatula knife>
Toppings, Optional
Sprinkle chocolate chips and chopped Reese's Pieces on top. Cut and serve.
Or
Drizzle
Drizzle melted chocolate and peanut butter all over the brownies.
Notes
3 bananas can be used instead of 2 if you want more banana flavor.