Banana Crumb Muffins

1-½ cups flour
1 tsp. baking soda
1 tsp. baking powder
½ tsp. salt
3 large ripe bananas, mashed
¾ cup sugar
1 egg, lightly beaten
1/3 cup margarine, melted

TOPPING

1/3 cup brown sugar
1 tbsp. flour
1/8 tsp. cinnamon
1 tbsp. margarine

In a large bowl, combine dry ingredients. Combine bananas, sugar, egg, and margarine; mix well. Stir into dry ingredients just until moistened. Fill greased or paper lined muffin cups three-fourths full. Combine the first three topping ingredients; cut in butter until crumbly. Sprinkle over muffins. Bake at 375 degrees for 18-20 minutes or until muffins test done. Cool in pan 10 minutes before removing to a wire rack. Makes about 12 muffins.