You've got 5th graders, right? Let me think... You could do the book Stone Soup and ask all the kids to bring in an ingredient and then make soup in a crock pot. You could have them all bring in different fruit and make a fruit salad. I read about a teacher who did that to illustrate how everyone contributes something different yet together we all work together....or something like that.
I can't see you doing much actual cooking though. When would you have time? Maybe you could work it in at the end of each lit unit/theme. Let us know how it turns out!
I have second graders - mostly boys! I'd like to do something that involves measuring and following exact directions. I have a LONG afternoon on Fridays and I like to do the "cooking" at least once a month. They have an early lunch and no break between 11:30 and 3:00 so we all need a snack! I'm thinking of no-cook desserts (cookies.... etc.)
I'd love the Halloween ideas! Thanks for your help all!