I've not been able to take jam though, so I doubt maple butter would make it. Put it in your checked baggage.

When I had the jam I was lucky to have a backpack with me, so I just took my camera out and checked in my backpack with the jar of jam in it. I got the same agent that I had checked my suitcase with a few min earlier and we joked about the very dangerous blackcurrants that had been made into jam. Definitely a threat to national security those blackcurrants are...