2 1/4 cups powdered sugar
2 tablespoons light corn syrup
2 to 3 tablespoons milk
1 teaspoon vanilla
Food coloring (optional)
Put 2 tablespoons milk in a bowl. Gradually whisk in powdered sugar, whisking until smooth. Then, add corn syrup and vanilla. Stir well. If too thick, add just a touch more milk until desired consistency. Use food coloring to color icing if you like. Spread frosting on cooled cookies. You can also dip cookies.
Too little milk, and the icing won’t spread nicely. Too much milk, and it will be too thin.
Once the icing has starts to harden just a bit you can decorate with sprinkles. You can also let icing dry completely and then pipe on Royal Icing to decorate and then add sugars and sprinkles.