2 sticks butter
1 box light brown sugar
3/4 c. sugar
4 eggs
2 c. flour
1/4 tsp. baking powder
1 1/2 tsp. vanilla

Melt butter and sugar. Beat in eggs, one at a time. Fold in flour, baking powder. Add vanilla. Pour into greased and floured 13x9x2 pan. Bake at 350 degrees for 35-40 minutes. Slice into bars while warm. Finish cooling in pan before removing.