I was looking to modify to low carb because I'm diabetic. I used two cups Splenda and one cup sugar. I also added 1/2 c. applesauce because the splenda dries cakes. This thing turn out to be one of the best cakes I have EVER made! I would highly recommend it. It is VERY buttery and VERY rich but it doesn't take a lot to fill you up as it is really dense. I will definately be making this again!