Yes, this southern baked mac and cheese freezes very well! Just cool the mac and cheese completely, cover tightly with plastic wrap and foil, and freeze for up to 2 months. Allow to thaw, still wrapped, in the fridge before baking as usual. I actually use this method to make my mac and cheese ahead of time for most Thanksgivings! You can also freeze leftovers in an airtight container for up to two months.