I would love to share! I found this recipe on the Wilton discussion boards.
Cookie/Petit Four Icing
Blend together well with mixer:
2 lbs. powdered sugar
1/2 c. light corn syrup
1/2 c. water + more for thinning as needed
1 1/2 tsp. vanilla (or flavoring of choice)
1/4 tsp. salt
When smooth add:
1/4 pound melted candy melts
Again, mix until well blended, always at low to medium low speed. Pour generously over cake squares or cookies placed on a rack. You can also use icing to draw, paint, outline, flood or add detail on cookies or cakes. It dries so that the cookies/cakes can be stacked and bagged. But when eaten they are still soft on the inside, unlike royal icing.
Store in frig.
If doing two coats on petit fours let the first coat dry completely. Let the icing set before adding other decorations or they will slide off.
Because of the candy melts in this recipe I use the Make n Mold colors or the CK powdered colors. I'm not sure if you can use regular paste colors. If anyone tries the regular paste colors please let me know how it goes.