Catherine's Banana Bread

Hands down the best banana bread ever! My friend Catherine's recipe. With additions by my excellent cook friend, Erin.

1/2 c. butter
3/4 c. brown sugar
3/4 c. sugar
1 t. vanilla
2 eggs
2 bananas - mashed
2 c. flour
1 tsp. baking powder
1/2 t. baking soda
3/4 c. buttermilk

topping- mix brown sugar, white sugar, cinnamon and nuts if desired.

Cream butter and sugars, add vanilla and eggs mix well. Stir in bananas. Alternately add dry ingredients and buttermilk. Mix completely between additions. Pour into greased pan. Top generously with crumb topping. (1 large or 3 small pans) Bake for 1 hr at 325 (less for smalls).