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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,
my understanding is that raw, cracked eggs last about 2-4 days in the fridge. So you're on the outside of that window. I'm not sure exactly how you're preparing your mac and cheese ahead of time and I think that will impact how long they will keep as well.y understanding is that raw, cracked eggs last about 2-4 days in the fridge. So you're on the outside of that window. I'm not sure exactly how you're preparing your mac and cheese ahead of time and I think that will impact how long they will keep as well.