You can use either Cool Whip Free (not the regular or lite), and only one serving (2 Tbsp). It counts as a sweet treat, too. You could also use heavy cream and whip it with splenda (or any other artificial sweetener). Again, only 2 Tbsp. With the first, you get some sugar and a bit of really bad fats, with the other, you get bad fats. Neither is great, but since you only use a tiny amount, it's okay on the diet. Just don't get carried away!!!
In speaking with Sarah today (Adia Faith), I realized that we might be coming across as confusing here!
Here's the lowdown on sugar alcohols:
Many of us hate them and think they are evil.

The reason for this is that they make most people sick. In addition, who knows what's in them? They are chemicals and therefore a bit scary.
On the other hand, they
are allowed on SBD. You need to limit your sweet treats (anything of non-nutritional value that is sweet) to 75 cals a day. If you do this, you are unlikely to eat enough of the sugar alcohols to cause diarrhea, the most common result of over-indulging. However, you may find that even that small amount will make you sick, so try things carefully and see how you feel. For instance, I have no problem with sorbitol in small amounts, but I can't have any malitol. It makes me violently ill.

So watch it and be careful. Read ingredients.
Most of all, try to stay away from those processed foods. If you are on SBD to become more healthy, as most of us are, you need to learn to eat things that make you feel healthy and strong. A mint or hard candy now and then won't kill you, but bags of SF chocolate may lend to an evening of pain! Your call.