I've never made this recipe but my experience with unsweetened chocolate is that it is bitter. Its probably just that you dont care for the chocolate taste. You might adjust the sweetener some to try to make it sweeter. The unsweetened chocolate that I have used, Bakers and Nestle is relatively dark colored. The taste of it, even with splenda added, is more like dark chocolate than milk chocolate so if you arent a fan of dark choclate, that might be why you dont care for it. I have tried to make it more milk chocolate like with extra splenda and cream, but its just not the same.