Hi Julie,

Ice cream made with Splenda gets really hard, really fast. That may be why the paddle (actually it is called a dasher) broke. A little alcohol helps keep it a little softer - alcohol does not freeze. You could try plain vodka for the least impact on the flavor of the ice cream. Or try kahlua or Bailey's or whatever you like. I think the ratio is about 1Tablespoon per cup of cream.

Rosemary