the best we've ever had.
Preheat oven to 375. Lightly grease or line muffin tins.
Mix flour, baking soda, baking powder & salt.
In another bowl, mix bananas, sugar, egg & melted butter.
Mix brown sugar, flour & cinnamon; cut in butter until resembles coarse meal. Sprinkle topping over muffins.
Bake 18 – 20 mins.
Topping:
1/3 cup brown sugar
2 Tbs flour
1/8 tsp cinnamon
1 Tbs butter