Macaroni and cheese often suffers when cooked a day early and reheated carelessly. Starch continues to drink moisture long after cooking finishes. You can streamline prep without sacrificing texture by using two proven techniques.
The Day-Before Assembly Method
Complete the recipe through Step 5, but do not bake. Allow the assembled casserole to cool completely at room temperature for 30 minutes. Cover the baking dish tightly with aluminum foil and refrigerate for up to 24 hours. When ready to cook, remove the dish from the refrigerator and let it sit on the counter for 45 minutes to shed the refrigerator chill. Bake covered at 350°F (175°C) for 20 minutes, then uncover, raise the heat to 375°F (190°C), and bake for an additional 15 minutes until bubbly. Finish under the broiler.
Reheating Cooked Leftovers
To reheat an already baked casserole, avoid dry oven runs. Drizzle 2 to 3 tablespoons of heavy cream or whole milk across the surface of the casserole dish. Cover tightly with foil and place in a 325°F (165°C) oven for 20 to 25 minutes. The added dairy turns to steam under the foil, rehydrating the pasta starches and returning the cheese sauce to its original silky state without scorching the crust.
