Mix 4 cups granulated sugar, 1 cup light corn syrup and 3/4 cup water in a saucepan, then cook over medium heat without stirring until 250 degrees on a candy thermometer. Beat 3 egg whites until firm; drizzle the hot syrup into the whites and beat until stiff. Stir in 1 teaspoon vanilla and 2 cups chopped hazelnuts or pecans. Shape into small balls with buttered hands, then roll in more chopped nuts and cool.
Recipe courtesy Food Network Magazine