Marshmallow Meringue

Makes enough for filling and frosting 1 (8-9") 2-layer cake or for 1 (9-11") tart
4 egg whites
1 ½ cups sugar
1/4 cup cold water
1/2 tsp. cream of tartar
1/2 tsp. kosher salt
2 tsp. vanilla extract

In a double boiler over simmering water, whisk together egg whites, sugar, water, cream of tartar and salt. Heat to 160°, whisking constantly (7-12 min.). Pour hot meringue mixture and vanilla into the bowl of an electric mixer; beat on medium-high until cooled to room temperature and icing is shiny and stiff. Try it in our recipes for Lemon Meringue Tart or S'mores Cupcakes.