One thing to take into consideration that many people don’t think about. If you have linoleum or other moisture impermeable flooring in the kitchen, you do not want to put something directly on the ceiling of the crawlspace below that flooring. Floor joists need to breathe. If you add foam directly to the ceiling of the crawl space (the area below the kitchen floor) you are creating a situation where the wood will rot. Same goes for insulated batting. If you use insulated batting, it is only going to turn moist from the dirt below. Batting does not work well in a crawlspace area with a dirt floor. It is usually suggested to insulate the foundation exterior walls versus the ceiling of the crawlspace to avoid trapping, moisture, causing mold.