I think a food gift to share is perfect. More of a providing a share of the food for the weekend vibe than a hostess gift vibe. I wouldn't worry about wrapping it up in a pretty way - sort of down play the gift thing.
POD. Food or drink that people will partake of and enjoy is a great hostess gift; it's very little muss or fuss for the host(s), and they don't have a tchotchke to awkwardly keep track of afterwards.