im an exmo, yeah that’s basically it. The “doctrine” we get that from says:

And again, hot drinks are not for the body or belly.

this was “interpreted” as caffeine specifically, probably because the cult leaders didn’t want to give up hot cocoa.

Yeah, that one’s a Mormon thing. The rule only covers coffee and tea if you want to be pedantic about it, though there are many ‘spirit of the law’ type people who avoid caffeine entirely.

Are Mormons also against alcohol?

Hot drinks is the scriptural term, but is officially interpreted as “coffee bean” and “tea leaf”.

So you could have peppermint tea, but not tiramisu.