Granulated sugar weighs more than the equivalent mass of powdered sugar. Because of this, use 1 3/4 cup powdered sugar for every 1 cup of granulated sugar you need. A straight substitution will not always yield the same result because of how sugar functions in recipes. read more
Powdered sugar is simply granulated sugar that has been crushed into a fine powder. Cornstach is often added to powdered sugar to prevent clumping. You can make powdered sugar from granulated sugar by simply blending 1 cup granulated sugar and 1 teaspoon cornstarch until a fine powder. read more