Here's a terrific recipe for buttercream icing for cookies with no raw egg whites. For any recipes that require egg whites, you can substitute dried, powdered egg whites, usually found at cake-decorating supply stores. Then you can still lick the bowl!
Ingredients
1 ½ cups confectioners' sugar
3 tablespoons butter, softened
1 tablespoon vanilla extract
1 tablespoon milk, or more as needed
3 drops red food coloring (optional)
Directions
Beat sugar, butter, vanilla, and 1 tablespoon milk in a large bowl until creamy. Mix in more milk, 1 to 2 drops at a time, to reach desired spreading consistency. Stir in food coloring.