Vanilla icing is the grand finale, the crowning glory, the pièce de résistance on thousands of different recipes including scones, cinnamon rolls, crumb cake, muffins, and so many more. Food coloring, as desired (see suggested colors below) 5 tablespoons light corn syrup. 1 tablespoon pure vanilla extract. I LOVE your cookies and this icing recipe, and have found that with a little patience and a LOT of research, I have made some amazing sugar cookies. 1 cup water. It's so quick and easy and made with only 4 ingredients! I absolutely love the shiny appearance of my cut out cookies using this Glossy Sugar Cookie Icing (that hardens)!This icing is perfect for either dipping your sugar cookies or flooding Christmas cookies, as well as using for a semi-transparent thin glaze on cookies, cakes, and other desserts. Don’t underestimate the power of a really good icing! For decorating, the most important lesson I have learnt is the “10 second rule,” whereby when you cut a knife through your bowl of icing, the cut mark disappears in 10 seconds. 3 (1 pound boxes) confectioners' sugar. Deselect All. It’s so simple, yet often overlooked.