Preheat oven to 350 degrees F. Spray 12-muffin tin with cooking spray.
2
Blend together apple sauce and brown sugar.
3
Beat in bananas, egg and egg white.
4
In a separate bowl, whisk together flour, baking powder, cinnamon and salt.
5
Gently stir half the flour mixture into the banana mixture, then the buttermilk, and then the rest of the flour mixture.
6
Divide the batter into the muffin cups, about 1/3 c for each. Bake until a toothpick inserted into center comes out clean and the tops are golden brown, about 20 min.