Ingredients

　　1 1/3 cups confectioners’ sugar

　　1/3 cup vegetable shortening

　　1/3 cup unsalted butter, room temperature

　　1/2 teaspoon pure vanilla extract

　　Pinch of salt

　　In the bowl of an electric mixer fitted with the paddle attachment, combine all ingredients. Beat on medium-high speed until fluffy and light, 3 to 4 minutes. Use immediately or refrigerate in an airtight container for up to 3 days. Let soften at room temperature before using.

　　Reprinted with permission from Martha Stewart's Baking Handbook by Martha Stewart. © 2005 Clarkson Potter