Ingredients
1 1/4 cups (2 1/2 sticks) unsalted butter, room temperature
6 tablespoons vegetable shortening
10 cups (from about two and a half 1-pound boxes) confectioners' sugar
1/2 cup milk
2 tablespoons Mexican vanilla
Preparation
In the bowl of an electric mixer fitted with the paddle attachment, beat together butter and shortening. Add sugar, and beat to combine. Add milk and vanilla, and beat until well combined.
