Why doesn’t this exist?
Take dried beans, roast 'em, grind 'em, and brew some bean juice?
I have no idea if it would taste good or not, but we don’t know if we don’t try.
Edit: I need to see what dried beans I have and maybe go shopping. I will give this a try with a couple different types of beans and report back if I fart or not.
Coffee isn’t a true bean—it’s more closely related to gardenias.
Interesting, but the all-knowing Wikipedia seems to agree with you:
From https://en.wikipedia.org/wiki/Coffee_bean:
I’m still tempted to try this, though.
Do not do this with dried beans. Most dried beans are toxic and need to be soaked and boiled for about half an hour to become edible.
From the Wikipedia page for kidney beans: