I've been using the "grind your own" peanut butter option at my local natural grocery store (it's cheap, no added sugar, less packaging) -- but it just doesn't taste good and is TOO stiff. I was thinking I would just put it in my cuisinart, add some salt & peanut oil and see what happens. Anybody ever try this? How much oil & salt per cup of peanut butter? I'm happy to experiment, but I thought I'd first check to see if there's any advice out there. Thanks.