Hi longway2go I've been making basically the same thing since I started - sure I read it on here somewere, but hadn't thought of popping it in the freezer or fridge to let it settle a bit, I just eat it straight out of the mixing bowl!

Just to give you pointers on your carb count, packet splenda and cream are not 0 carb.

Splenda packets are 0.9g carb (Dr A says count them as 1) and 1/2cup heavy cream = 118ml. The numbers on all the heavy cream in the UK are 100ml = 2.6 -2.7g carbs. (The carb tools at the top of this forum list heavy whipping cream as 2.79g carbs per 100ml)

So your actual carb count per serving (assuming you make 2 servings) is

2g cocoa + 2g splenda + 1.5g cream = 5.5g carbs

The cocoa powder I use (Cadburys in the UK) is 1g for 10g of powder - which when I measure a level tablespoon, comes out at 7.5g weight = 0.75g carbs. Is your cocoa a pure cocoa with no added fillers/ sugars etc?