6-25-14 Rhubarb torte 5 Published June 25, 2014 at 2592 × 1728 Then add and beat into the egg whites: •1/4 teaspoon cream of tartar; •Dash of vanilla; •Dash of salt; •1/3 cup powdered sugar. Spread over middle rhubarb section. Bake at 325 degrees for 5 minutes to brown slightly the meringue.