I wish I could help you with a recipe. I use Twinlabs, Chocolate Surge. However, there are carbs-8 to be exact minus 2g Fiber. There are no hidden carbs, and no aspartame. To this, I add 1 TAB flaxseed oil, 1 TAB heavy cream, 1 scoop of pure whey protein, and a heaping tsp of glutamine powder. I have also tried the KETO brand and it tasted great too! The KETO (Chocolate peanutbutter) has only 2 carbs minus .5 fiber. Again, no hidden carbs and no aspartame. I tried the vanilla flavor and added 1/2 c. of a frozen triple berry blend (raspberry, marionberry, and blueberry) It tasted wonderful, but found out (eventually) I seem to have an intolerance for berries

Sorry this isn't exactly what you were looking for. I hope you find something that works for you and tastes good. Oh, almost forgot. I do use different flavored extracts to change the tastes around. I don't know the carb count or effects on insulin levels.