What is the correct icing for sugar cookies?

Royal icing is the traditional and most popular icing used for sugar cookies, but there are many other options to choose from. Icings vary in flavor, texture, and color. Some other options include:

- Buttercream icing is a smooth and creamy icing made with butter, sugar, and milk.

- Cream cheese icing is a tangy and rich icing made with cream cheese, butter, and sugar.

- Chocolate ganache is a decadent icing made with chocolate and heavy cream.

- Glaze icing is a thin and shiny icing made with sugar and water or milk.

- Fondant is a pliable and versatile icing that can be molded into different shapes and colors.

- Marshmallow fluff icing is a light and fluffy icing made with marshmallow fluff, butter, and sugar.

- Whipped cream icing is a light and airy icing made with whipped cream, sugar, and flavorings.