Buttercream icing and royal icing are two popular types of icing. Buttercream icing is soft and smooth. Buttercream icing is made from icing sugar, butter, and milk. Flavors and colors are also added. It has a creamy taste. Buttercream is used as a topping, filling, coating and decoration of cakes, sweets, cookies, and cupcakes. Buttercream has a short span as it is made from dairy.
It must be stored in an airtight container and refrigerator if not in use. Royal icing is harm and a lot firmer than buttercream icing. It is made from sugar and beaten egg whites. Royal icing is mostly used for decoration of cakes. Royal icing decoration lasts longer than buttercream icing.