[header] How to make coffee icing [title] Prepare the strong-brewed coffee and set it aside. [step] You can make some using a coffee maker or one part instant coffee and one part hot water. You can also use a shot of espresso. 
[title] Pour the powdered sugar through a sieve into a bowl. [step] This will break up any clumps that might be in the sugar, resulting in a smoother texture when you finish.