I found this recipe while looking for something special to make my diabetic uncle for thanksgiving. A word on the sweetener. I have tried different combinations of sweeteners, including Splenda packets, Sweetzfree liquid Splenda, and powdered erythritol. I had the best results using the powdered erythritol and Sweetzfree, which is a very concentrated liquid. I have found that with chocolate, using artificial sweeteners with no sugar alcohols produces only an "OK" result. Adding a low glycemic sugar alcohol (not maltitol) improves the flavor and texture when working with unsweetened chocolate.