Karen, you're a genius! I found whey protein concentrate today and tried making the filling. I started with 1 tablespoon of the whey and added cream, 1 teaspoon at a time until it was the right consistency (it took 6 teaspoons), then added a little sweetener and some apricot flavoring. I tastes great and I think the carb count for the filled chocolates will be doable: the whey has 9 grams in one tablespoon and the cream has .4 per tablespoon, so the small amount of filling I made has 9.8 grams of carbs and is probably enough to fill 5 candies, which makes 1.9 each.
The chocolate itself has very few carbs; for 6 ounces of the finished chocolate I use 2 ounces of unsweetened chocolate and 4 ounces of cocoa butter, so six ounces of finished chocolate has 8 grams of carbs and makes a ton of little chocolates. Well, let's say it makes 30 (because I can't remember exactly, but 30 is probably close), so each candy has .26, plus 1.9 for the filling, which makes each filled chocolate 2.16 grams of carbs!!!
Of course, these are not the kind of thing you'd make every day, but once in awhile you could have a couple a day without causing any problem, assuming you can stop at two, that is.
The occasional low carb chocolate treat is the only thing standing between me and a wild Belgian chocolate binge followed by a Godiva hangover and horrible guilt!
Thank you very much for your help, Karen; my husband will be very happy as soon as he tastes this stuff!
Karla