Brown Sugar Marshmallow Frosting

• 2 cups brown sugar
• 1 cup granulated sugar
• 3/4 cup water
• 1/2 teaspoon vanilla
• 5 marshmallows
• 2 egg whites

Cook sugar and water over low heat until it spins a thread. Add vanilla and marshmallows. Beat until marshmallows are dissolved. Pour gradually onto the stiffly beaten whites, beating constantly.