Yes, I used Karen's recipe. It is cooling on our bakers rack right now, but I can tell already that it is very, very bitter. My husband is trying to get me to laugh at the situation, and it is kinda funny. I had plenty of Splenda on hand, and didn't need to run to the store (in this lovely East Coast storm no less!). I didn't realize that the Sugar Twin to which she referred was not the saccharin Sugar Twin we can get in the store. Oh well, I hope everyone who reads this and wants to try to recipe will not do what I did!