This sugar cookie icing dries hard and shiny and the colors stay bright. Choose as many different colorings as you desire to make beautiful decorations on your cookies. This recipe makes enough icing to decorate a dozen sugar cookies.
Achieving the perfect consistency is paramount: For outlining, aim for icing that flows slowly from a spoon but holds its shape. For flooding, it should be thinner, flowing smoothly but still viscous enough to stay within borders. Adjust with tiny amounts of milk (to thin) or confectioners' sugar (to thicken). For vibrant, streak-free colors, opt for gel food coloring, adding sparingly. For a richer flavor, consider substituting almond extract with a high-quality vanilla bean paste or a touch of lemon zest. Ensure cookies are completely cool before icing to prevent melting. Allow ample drying time, ideally overnight, for a hard, shiny finish that won't smudge.