Butterscotch Squares with chocolate

1 cup all-purpose flour 1/2 teaspoon baking powder 1/3 cup butter , melted and cooled slightly 1 cup packed light brown sugar 1 egg 1 teaspoon vanilla extract[...]

3/4 cup butter (1 1/2 sticks) 2 cups firmly packed brown sugar 2 tablespoons instant coffee powder 2 large eggs 1 tablespoon vanilla extract 2 cups[...]

1 cup butter , softened, divided 2 cups brown sugar , packed 2 eggs 2 teaspoons vanilla 2 1/2 cups all-purpose flour 1 teaspoon baking soda 3 cups Robin Hood[...]