Yes! Leave the sauce a little on the runnier side to ensure it reheats well without becoming dry. Add a little more milk or pasta cooking water. Allow the cooked mac and cheese to cool and then pack it into a freezer-safe container. Finally, freeze for up to 3 months. To reheat, defrost the Mac and Cheese at room temperature, transfer to a pan or oven dish for reheating on the stove-top or in a pre-heated oven. Above all, ensure the mac and cheese is piping hot before serving.