Oven: Preheat to 350°F, place mac and cheese in an oven-safe dish, add a splash of milk, cover with foil, and heat until warmed through
Stovetop: Put in a saucepan over low heat, add a little milk or cream, and stir frequently until hot
Microwave: Place in a microwave-safe bowl, add a splash of milk, cover loosely, and heat in short intervals, stirring between each
Air fryer: Place in an oven-safe dish or foil container, cover if needed, and heat at a low temperature until warmed through
Add moisture: Mix in milk, cream, butter, or a little pasta water before reheating
Stir often: Stir during reheating to keep it creamy and heat evenly
Check temperature: Reheat until steaming hot throughout before serving