Preheat oven to 325 degrees.
Heat egg whites and sugar over hot water to warm. Whip until stiff, adding the extract at the end. Fold in the unsweetened chocolate. Pipe kisses onto parchment paper and bake for 20 to 25 minutes. Cool. Drizzle with melted semisweet chocolate. Let sit until chocolate sets up.
Recipe courtesy of Gale Gand