I think cooking classes are too much of a commitment unless you are CERTAIN she would like it. Otherwise, it could be seen as a chore – she’d have to go so as not to offend you and that would be annoying. If it’s one time only, that’s not too bad.
In general, gift certificates to do things are annoying unless they are something the person has always wanted to do. They introduce a sense of obligation to redeem that detracts from the gift.
What’s your budget? And I might have missed this, but is this your Mom or your wife?
