2 c. flour
1 tsp. baking powder
1/4 tsp. baking soda
1 tsp. salt
2/3 c. butter, melted
2 c. brown sugar
2 eggs
2 tsp. vanilla

Sift dry ingredients. Add sugar to butter and mix well. Blend eggs and vanilla into mixture. Add flour, mix slowly. Bake in greased and floured 9 x 13 inch pan for 20 to 25 minutes at 350 degrees.