I'd like to note something, in case it hasn't been mentioned:
I just (latest patch) tried to combine a Mug of Beer with a stack of Dinner, to make Dwarven Stew.
It didn't work. The popup where it asks me how much I want to make comes up, the image of a Dwarven Stew is shown, and it goes through the "loading bar" as it crafts, but then I get nothing, and nothing is consumed.
Splitting the stack of Dinners up before combining it with the Mug of Beer solved it.
I don't know what caused it or where to report it, or if it's a known bug, but I just thought I'd mention it here.
The Crafting system in DO:S is great, but damn, keeping track of it is an utter bitch. Also, food could really stand to last (much) longer, I don't really see much of a point to it right now, except between-fights healing, but if that's it, why have +Str or +Int modifiers on things?
It's not like you'll be eating 18 cheese wheels while fighting dragons, anyway.