Place the bowl with the chocolate and butter in the microwave. Beat the whites on high speed until they form stiff peaks.
Place the egg whites in a stand mixer with the whisk attachment (or large bowl with an electric hand mixer). Mix well until the sweetener and yolks have completely combined.
Place the yolks in a mixing bowl and add the powdered sweetener. Then spray the sides and bottom with non-stick cooking spray.Ĭhop your chocolate bars into small pieces. Use a scissor to trim all the extra paper around the outside of the pan. Using a 7-inch (or 9-inch) springform pan, place a sheet of parchment paper on the bottom, and close the “ring” of the pan around the paper.