Preheat oven to 375°F and grease or line a muffin tray.
Mix flour, baking soda, baking powder, and salt together in a small bowl.
In a separate bowl, beat sugars and butter together with an electric mixer.
Add in the mashed bananas, peanut butter, vanilla, and egg.
Stir in the flour mixture until just combined.
Fold in the chocolate chips.
Spoon the batter into the muffin tray; each one will be about ¾ the way full.
Sprinkle the tops with the 1 T. white sugar (optional).
Bake for 13-15 minutes for regular muffins or 8-9 minutes for mini muffins or until a toothpick comes out clean.
Let the muffins cool in the pan for a few minutes before removing them to a wire rack.
Yield: 16-18 regular muffins or 36 mini muffins
Store in air tight container.
Notes
**Puree in a food processor or use a potato masher or forks. The potato masher and forks will probably make muffins with some banana chunks. The food processor will make muffins with just the banana flavor.
Recipe by Birch Tree Baking at https://www.birchtreebaking.com/peanut-butter-banana-chocolate-chip-muffins/