**Servings is set to 6 because 4 large whole acorn squash cooked down doesn't actually feed a ton of people. 1 large acorn squash likely weighs approx. 1/2 - 3/4 of a pound feeds two. So if you want to feed 10+ you will need more than 8 large whole acorn squash (and that's probably without considering seconds).
Keyword acorn squash, casserole, holiday, potato-free, side dish, thanksgiving