Mix together the flours, baking soda, baking powder, and salt together in a small bowl. In a second bowl beat sugars and softened butter. Add the mashed bananas, peanut butter, vanilla, and egg. Stir the flour mixture into the banana mixture until just combined; add 3/4 cup of chocolate chips to the batter and mix. Spoon batter evenly into the prepared muffin cups. Sprinkle the tops of each muffin evenly with the remaining chocolate chips and turbinado sugar.