Butterscotch Chip Bars without chocolate ginger

1 (18 1/4 ounce) package yellow cake mix with pudding 2 large eggs 1/2 cup margarine , melted (do not use the margarine in the tubs) 1/4 cup brown sugar 1[...]

3 cups flour 1 teaspoon baking powder 1/2 teaspoon baking soda 1 pinch salt 2 tablespoons unsweetened cocoa powder 1/2 cup packed dark brown sugar 1/2 cup[...]

2 cups flour 2 cups brown sugar 3 eggs 1 teaspoon baking powder 1/2 teaspoon baking soda 1 teaspoon salt 2/3 cup butter 2 teaspoons vanilla 1 (10 ounce) bag[...]

2 1/4 cups flour 1 teaspoon baking soda 1/2 teaspoon salt 1 cup butter 3/4 cup sugar 3/4 cup light brown sugar 1 teaspoon vanilla 2 cups butterscotch chips 2[...]