This decorator's staple remains an old reliable when all else fails. It even performs well in warm weather.
Epicurious Editors' Notes:
• This recipe yields more than enough for two cakes—if icing only one cake, make a half recipe or freeze the extra.
• If using the icing to write on a cake, soften it with extra liquid. If using it to pipe roses, add extra confectioners' sugar.
• Meringue powder is available at wilton.com.