3/4 c. butter
3/4 c. sugar
3/4 c. firmly packed dark brown sugar
1 tsp. vanilla
3 eggs
2 c. unsifted flour
2 tsp. baking powder
1 tsp. salt
12 oz. chocolate chips

Combine butter, sugar, brown sugar and vanilla; beat until creamy. Add eggs, 1 at a time, beating well after each addition. Gradually add flour, baking powder and salt. Mix well. Add chocolate chips. Spread evenly onto well greased 15"x10"x1" baking pan. Bake at 350 degrees for 30 to 35 minutes. Cool; cut into 2" squares. Makes 35 (2") squares.