Icing sugar comes in different grades according to how finely the sugar is milled, denoted by the number of Xs on the packet. Icing sugar easily absorbs moisture and odours – keep in an airtight ...
Basic icing is sugar mixed with milk, which is then flavored with cream cheese, cocoa powder and butter or egg whites. The simplest frosting of all, glacé icing, is just powdered sugar and water.