Increase speed to high and continue to beat until icing holds stiff peaks, about 3 minutes in a stand mixer or 10 minutes with a handheld. If not using icing immediately, cover surface with a damp paper towel, then cover bowl with plastic wrap. * icing can be made one day ahead and covered as directed.
Submitted By: Betsy
Original Source: Gourmet Magazine
Dries hard enough to stack the cookies, but still tender enough to enjoy. The hint of lemon in the icing adds a nice flavor without taking away from the cookies.