What is usage xp (UXP)?
Usage xp is earned when someone uses an item you crafted. Generally you get 50% of the crafting xp when someone eats your food. Right now, that “someone” can even be you (although I’m not sure whether or not this is intended). Simple enough in theory, but in practice there’s a few complications. First, the xp is only added when the last dose of a stack is used. Second, you need to be in close proximity to the person eating your food. Finally, you need to be logged in at the time. UXP is so sporadic it’s better off not worrying too much about it and focus on just crafting items for your xp. One exception is when you’ve just gotten Novice Chef and are grinding Soypro. Since Soypro is a component, it has no filling, so eating it adds nothing to your food bar. If you made it in practice mode, you’d get 80 * 1.05 = 84xp. If you actually create the item and then eat it, you get 80 * 1.5 = 120xp.