1/2 cup butter
2 eggs
1-1/2 cups packed brown sugar
1 teaspoon vanilla
1-1/2 cups flour
1/2 teaspoon baking powder
1/2 teaspoon salt
1 cup chocolate chips
Melt butter; gently stir in all remaining ingredients, except chocolate chips, just until mixed. Do not beat! Pat into greased 13×9 inch pan. Sprinkle with chocolate chips. Bake at 350 F for about 20 minutes. Cool; cut into bars.