When making a coffee on Shabbat, is one allowed to put the artificial sweetener, such as Splenda or Stevia, into the cup and then add the hot water from Kli Rishon?
If the sweetener is pre-cooked, then this procedure would not be not a problem. On the other hand, if it's not pre-cooked (or heated considerably to a point that makes it "Mevushal"), one would have to add the sweetener after putting the water in the cup. So, are these sweeteners considered "pre-cooked" or not?