Keep fresh escarole wrapped in paper towels stored in an unsealed plastic bag in the refrigerator or in the crisper for up to five days. Do not wash until ready to prepare it since water will encourage deterioration. It will lose crispness the longer it is stored so use as soon as possible for the best results, especially when serving raw. Cooked escarole will keep for up to three days in an airtight container in the fridge. Freezing is not recommended since it will break down the delicate leaves.