I'd vote looking into ways of making your own pudding like dessert. That way you can avoid the extra carbs (they use dry milk powder) as well as the asperteme. Do a search in the recipe section on here for chocolate mousse or pudding to see others ideas.

One thing I found that works well is to take and whip up some whipping cream. When it's close to stiff add in some cocoa powder and some sweetner (for an extra rich treat mix in a little sour cream or cream cheese) then whip more until stiffer.