Preheat the oven to 375 ° F. Grease a 12-cup muffin tin or line cups with paper liners. Sift flour, baking powder, baking soda, and salt together in a bowl; set aside.
Mix bananas, sugar, egg, and melted butter in a separate large bowl until well combined; mix in PBfit Peanut Flour Baking Blend until smooth. Add in chocolate chips and combine. Spoon batter into the prepared muffin cups, filling each 2/3 full.
Bake in the preheated oven until the tops spring back when lightly pressed, about 25 to 30 minutes. Cool briefly in the tin, then transfer to a wire rack to cool completely.
Enjoy your Peanut Butter Chocolate Chip Banana Bread Muffins!