When you’re ready to eat, take the dish out of the fridge (or defrost it overnight in the fridge if frozen). Let it sit on the counter for 30 minutes to take the chill off, otherwise the dish will bake unevenly. Then sprinkle your breadcrumbs on top, dab a few pats of butter over them, and bake at 350°F (175°C) for about 30–45 minutes (longer if it’s coming from frozen).
Yes! Make Mac and Cheese Ahead (And It’ll Still Be Amazing) - Terra's
You’ll know it’s done when it’s bubbly at the edges and golden on top. If the middle looks cold, just give it five more minutes—patience is a virtue, especially when cheese is involved.
