Ingredients

1 large egg white or 2 1/2 tablespoons meringue powder mixed with a scant 1/4 cup water 

2 cups confectioners' sugar, sifted 

Juice of 1/2 lemon 

Preparation

In the bowl of an electric mixer fitted with the whisk attachment, beat egg white until stiff but not dry, about 2 minutes. Add the sugar and the lemon juice; beat 1 minute more. If the icing is too thick, add a couple drops of water; if icing is too thin, continue beating to achieve desired consistency.