To prepare a the nutcracker sweet recipe, you'll need: 1 cup granulated sugar, 3/4 cup margarine, 1/2 cup evaporated milk, and 1 teaspoon vanilla extract. Preheat the oven to 350?F (176?C) and grease two 8-inch square baking pans with nonstick cooking spray. Line the baking sheets with foil and set aside. Melt the chocolate chips in the microwave for 30 seconds, stirring constantly, until they're melted and smooth. Beat the egg whites until stiff peaks form. Gradually add the confectioners' sugar and beat again, scraping down the sides of the bowl as needed. Pour the mixture into the prepared baking dishes and bake for 20 minutes, or until the tops are browned and the center is set. Let cool before cutting into squares.