Whatever it's called, it's the basic recipe of marshmallows, cereal, and if it's really going to be eaten, butter or margarine (if it's display only artists will often leave this out for an even denser, more sculptable medium).
If you've ever made it, you know the general method of warming the marshmallows to the point of melting and then mixing in the cereal means a lot of strong-arm mixing to shove all of that cereal into the marshmallows evenly.
Well I stumbled on a video the other day by Cake Frame - a British company that makes interlocking, modular cake stands, run by Dawn Butler - where Dawn mentioned her method of making RKT by dumping everything into a microwaveable bowl and letting the marshmallows puff up and engulf the cereal.
I just tried it, and I'm gobsmacked at how much easier this is than the old fashioned way! You have to watch it so you can see when your mixture has puffed up, but once it has you just take it out, give it a quick and easy stir since most of it is air, and plop it in the fridge.
This has the added benefit of tons of air in the mixture and the cereal not being crushed by the mixing. This is important because when cake artists sculpt with the stuff, they can then use the internal air to start forming shapes and crush down with their hands to finesse the shapes, meaning greater control and less trimming needed later.
This is pure genius. And even if you're not a cake decorator but just want to make a snack for yourself or your kids, this just made this classic recipe so much easier!
And because she's pretty much just going equal weight to equal weight with the cereal and marshmallows, you don't need to worry too much about your bag size in various countries. I just used a 150g bag of cheap Waitrose marshmallows I got from Ocado, and measured out 150g of cheap cereal on top. I plopped in an "about that" amount of margarine.
She has a post on FB about it here and this should be fine publicly without having to login to FB at all: https://www.facebook.com/CakeFrameLtd/posts/788320204595123
But in case that doesn't work, I'll post a screencap below.
If you're on FB and at all into cake, go friend Cake Frame. You'll be glad you did!