Product Measure Substitute Arrowroot 1 tablespoon 2 tablespoons all-purpose flour Baking Powder 1 teaspoon 1 tablespoon 1/3 teaspoon baking soda plus 1/2 teaspoon cream of tartar 1-1/2 teaspoons baking soda plus 1-1/2 teaspoons cream of tartar Brown Sugar, Light Read More …