This icing is known for adding food coloring to it. I use this recipe all the time. I just made my little sisters cake with this adding alternate food coloring to it. It’w also very simple to make.
1/2 teaspoon salt
1 teaspoon vanilla extract
8 tablespoons warm water
2 (16.oz) packages confectioner’s sugar
combine all ingredients into a large bowl and beat until fluffy.