Butter is actually quite low in lactose content (like 9x less than milk) and the serving size is relatively small: https://en.wikipedia.org/wiki/Lactose_intoler

Butter is actually quite low in lactose content (like 9x less than milk) and the serving size is relatively small: https://en.wikipedia.org/wiki/Lactose_intolerance#:~:text=Typical%20lactose%20levels https://en.wikipedia.org/wiki/Lactose_intolerance#:~:text=Ty... So generally butter is not a problem for people with lactose intolerance anyway.