We haven't totally banned PB. I keep some put away and use it with apples or bananas. When I have a student with an allergy, I make sure they aren't in the room and clean well after.
There are some good fiber and protein bars that have a good balance and not too much sugar in them (less than 7 grams). I keep those around as well.
Could you do those peanut butter filled pretzels? That way the PB is contained and no contact happens.
Thanks equineacres. We have "Sabrina's Law". It doesn't matter if any students in the school have allergies. PB and "might contains" are totally banned across the board. :(