Foolproof Buttercream
Notes: You can make this frosting up to 1 week ahead; cover airtight and chill. Before using, let buttercream come to room temperature, then beat briefly at medium speed to restore texture. In place of the vanilla in step 4, you can flavor buttercream with 2 to 3 tablespoons liqueur, 6 ounces bittersweet chocolate, melted, or up to 1/2 cup strained jam of any flavor. Soften the butter briefly in in a warm place in the kitchen or in a microwave oven until very soft but not melted.