Sweet recipe! I'll give that a go as I was having some trouble fitting the cream into my macros, 100ml of light is like 18g fats, havent found any lighter, other option was to just switch to frozen yoghurt.
Have you tried the lorann flavouring oils? I bought some butterscotch and tried to make a batch but didnt get any real taste out of it. Got some chocmint and orange to experiments with but I think im just gunna grab some chocmint/choc honeycomb flavoured protein.