When storing chicken schnitzel, it is best to store them in an airtight container in the refrigerator for up to 3 to 4 days. Additionally, you can store cooked chicken schnitzel in the freezer for up to 3 months. To freeze, place the schnitzel in an airtight container or freezer-safe bag. When ready to reheat, thaw in the refrigerator overnight and then reheat.