This is so easy to use and looks great! I definitely recommend using a squeeze bottle or piping bag.
Easy Cookie Icing/Glaze
3 C. confectioner’s sugar
½ tsp. Pure vanilla extract
2 tsp. Light corn syrup*
4 ½ - 5 Tbsp. room temperature water
Pinch of salt
Using a fork, stir the sugar, vanilla, corn syrup and 4 ½ Tbsp of water together in a medium bowl. It will be very thick and almost impossible to stir. Switch to a whisk and whisk in ½ Tbsp water. If you lift the whisk and let the icing drizzle back into the bowl, the ribbon of icing will hold shape for a few seconds before melting back into the icing. That is when you know it’s the right consistency and ready to use.
If desired, stir in gel food coloring. You can pour some icing into different bowls if using multiple colors. Use 1 to 2 drops at first and add more as needed, remembering that color darkens as icing dries.
Spoon icing into squeeze bottles or piping bags fitted with Wilton tip #4. Decorate your cookies as desired. I usually outline the cookies with icing first then fill in the middle. If adding sprinkles, add them right after applying the frosting to your cookies.
The icing takes 24 hours to set. Once the icing is set, these cookies are great for gifting or sending.
This recipe is enough for icing 2 dozen cookies.
*Corn syrup is what gives the icing fabulous shine. You may leave it out if you aren’t concerned about shiny, glossy icing.
Recipe from https://sallysbakingaddiction.com/easy-glaze-icing/