1 3/4 bars butter
1 box brown sugar
3 eggs
1/2 tsp. vanilla
2 2/3 c. flour
3 tsp. baking powder
1/2 tsp. salt
1 (12 oz.) pkg. chocolate chips

Melt butter and brown sugar together. Add eggs and vanilla. Mix well. Add dry ingredients. Mix well. Stir in chocolate chips. Pour into greased 9 x 13 inch pan. Bake at 350 degrees for 30-35 minutes.