I didn't know that. (And I'm not entirely sure about the cake part, but I am a chemist who has made acrylamide gels for electrophoresis successfully).A class is not needed and the time required isn't that much. If you could make a cake from scratch, you can make and coat an emulsion.
Actually, it's a fine activity that you can do in stages. For example, precipitate and ripen. Stick in the refrigerator and walk away for a week. Wash, then refrigerate and walk away and so on. A work flow like that may or make not make a noticeable difference in the final product but you can work that way with just fine results. Most of the hardware supplies you need that you might not already have in your darkroom can be bought at any dollar store.
It's tough to know where to start without a class to see what really matters in doing it. Those who have been doing it for awhile don't always remember what it's like to be a total newb (I know I was bad with that aspect when teaching new trace analysts how to do polarized light microscopy and infrared spectroscopy). Having a simple roadmap would be a great assist.
I'd be most interested in making paper - especially one that worked well for contact prints as I'm currently in between darkrooms and don't have an enlarger.