2 c. flour (unsifted)
1 tsp. baking powder
1/4 tsp. baking soda
1/4 tsp. salt
2/3 c. butter
2 c. brown sugar
2 eggs
2 tsp. vanilla
1 (6 oz.) pkg. chocolate chips

Melt together butter and brown sugar. Cool. Beat in eggs and vanilla. Stir in flour, baking powder, baking soda and salt. Pour into greased and floured, 9 x 13-inch pan. Sprinkle with chocolate chips. Bake at 350 degrees for 25 to 35 minutes.