That's it right now, it's just a name. But I thought of it right this second, and I like it, and I 'googled' it and no-one else has called anything that yet, so I'm claiming it as my own by blogging it. 'Thermo FroYo' is mine, and it means that much to me.
Recipe to follow, of course. Over the Easter holidays some time... (unless I get out more) ;)