This is super easy and a fun, different way to frost sugar cookies. I got this recipe from Our Best Bites. You should check out that site, it has some fun ways to use this frosting.
4 cups powdered sugar
6 tbsp. milk
6 tbsp. light corn syrup
1 tsp. almond or vanilla extract
Whisk the powdered sugar and milk together until all the sugar is completely dissolved. Add the corn syrup and extract. Whisk together some more. Add desired coloring. Use a spoon to put a small amount on each cookie and then spread to cover the entire cookie. Or if you're in a hurry pour a bunch on each cookie, spread a little, and the extra will just drip over the edges. YUM!