Preheat the oven to 350 degrees F (180 degrees C). Gather all of the ingredients.
Brown the butter: In a small saucepan over medium heat, melt the Butter (5 tablespoon). Continuously stir. As the butter melts, it will foam and turn into an amber color.
In a small bowl, mix together the Banana (1), browned butter, Vanilla Extract (1/2 teaspoon), Brown Sugar (1/2 cup), and Peanut Butter (1/4 cup).
In a separate bowl, mix together the Dried Blueberries (1/4 cup), Dried Cherry (1/4 cup), Dark Chocolate Chunks (1/4 cup), Walnut (1/2 cup), Oatmeal (1 1/2 cup) and All-Purpose Flour (1/3 cup). Then mix the dry and wet ingredients together.
Line a 8x8 pan with wax paper and then spray with non-stick spray. Pour in all batter and spread evenly. Bake for 30 minutes.
Remove from the oven and allow to cool for 20 minutes.
Cut into 9 squares and enjoy!