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Dr. Gourmet Says... You should be safe to keep your baked Macaroni and Cheese in a tightly covered container in the refrigerator for about 48 to 72 hours. Let it cool, uncovered, for about 10 or 15 minutes before covering it and putting it in the fridge.It will be safe to keep it frozen for about 2 months.I like to use freezer bags and divide meals like this into portions before freezing so that I can pull out what I need later. Thanks for writing,et it cool, uncovered, for about 10 or 15 minutes before covering it and putting it in the fridge. It will be safe to keep it frozen for about 2 months. I like to use freezer bags and divide meals like this into portions before freezing so that I can pull out what I need later. Thanks for writing,
LEFTOVERS: LAST 3 - 4 DAYS. Kung Pao chicken, pepperoni pizza, or tuna salad must go in the fridge within two hours of serving to reduce your risk of food-borne illnesses, because bacteria grow more quickly at room temperature.ut foods don't stay fresh in the fridge forever, and the day will come when you take something out and wonder if it's still good to eat or has gone bad. On The Early Show Monday, ShopSmart magazine Editor in Chief Lisa Lee Freeman had the lowdown on how long foods last in the fridge.