Banana Muffins

1/2 C. butter
1 1/2 sugar
2 C. mashed bananas
2 eggs
1/2 C. sour cream

Add:
2 1/2 C. flour
1/2 tsp. soda
1 tsp. powder
1/2 tsp. salt

Bake 20 minues at 350* Makes 2 dozen