Super Banana Muffins

1. Preheat oven 375ºF. Line a muffin pan with liners or grease and flour.
2. Mix together the dry ingredients: flour, baking powder, baking soda, salt and cinnamon.
3. Mix together in a separate bowl the wet ingredients: mashed banana, sugar, egg, oil (or applesauce) and vanilla.
4. Add wet ingredients to dry ingredients and stir just until barely combined.
5. Scoop into the muffin tin using a 3-tablespoon scoop or simply fill until 3/4 full.
6. For the streusel topping, in a small bowl, mix together the brown sugar, flour and cinnamon. Mix in the butter with your fingers until the mixture resembles fine crumbs. Scoop about 1 tablespoon of streusel topping onto each muffin.
7. Bake 17-20 minutes.