You might remember Viennetta, the swirly layered ice-cream cake. It's apparently difficult to find in the US these days, but you don't need to eat it to enjoy it anyway—all you need to do is watch this assembly-line video of it being made. Ooh at the rippling layers of ice cream, ahh at the lines of fudge, and let your brain's never-ending noise be dulled into a pleasant purr (at least until your anxiety kicks in again).
Yes, this video is a few years old, but it's also underseen. And it's more hypnotic than Hypnotoad: