2 c. flour
2 tsp. baking powder
1 tsp. baking soda
1/4 tsp. salt
10 tbsp. butter, divided
1/2 c. nuts
1/4 c. brown sugar
3 tsp. vanilla, divided
1 c. sugar
2 eggs, beaten
1 c. banana, mashed
1/2 c. sour cream

Combine first 4 ingredients. Combine 2 tablespoons butter, nuts, brown sugar, 1 teaspoon vanilla and mix well with fork. Reserve 1/4 cup of this mixture for top. Pat rest of brown sugar mixture on bottom of 9x5 pan.

Cream rest of butter and sugar. Combine eggs, banana, sour cream and rest of vanilla and add to creamed mixture. Gradually blend in dry ingredients. Pour in pan; top with reserved brown sugar mixture. Bake at 350 degrees for 50 minutes.