1 cup sugar
1/4 cup water
2 egg whites
1 stalk rhubarb, chopped*
Beat the egg whites and salt to soft peaks using an electric mixer. Meanwhile, in a medium saucepan, bring sugar, rhubarb and water to a boil, stirring occasionally. Continue to boil until it reaches soft ball stage (when a drop of the syrup forms a soft ball when dropped in cool water)while continuing to stir occasionally. Strain and discard the rhubarb. Keep the mixer running (you need a stand mixer or a friend to complete this next step) while you pour a continues stream of the molten syrup into the egg whites. Continue to beat for about 5 minutes, adding vanilla after about two minutes, or until the frosting is fluffy, glossy and cool. Frost cooled cupcakes or cake.
*If your rhubarb isn’t very red, you can add a drop or two of red food coloring to color the icing if you’d like pink frosting. Very red rhubarb will yield pink frosting without dye.
Yield: enough frosting to generously frost one single layer cake or 12 cupcakes