1/2 c. butter
1 c. brown sugar
1 egg
1 c. flour
1/2 tsp. baking powder
1/4 tsp. baking soda
1/8 tsp. salt
1 tsp. vanilla
Chocolate chips

Melt butter and add brown sugar. Cool slightly. Add remaining ingredients. Mix and pour into greased 9"x9" pan. Sprinkle chips on top. Bake at 350 degrees for 20 minutes or until a toothpick comes out clean.