As we have seen in a previous Halacha Yomis, a non-kosher frying pan requires libun, and a kosher frying pan (
kashered when uncertain if dairy or
fleishig) may be
kashered with
hagalah or
libun kal. The question is how to categorize this frying pan. On the one hand, the pan was used with both milk and meat and it requires
kashering. In this respect it is similar to a non-kosher frying pan. Nonetheless, the Chasam Sofer (YD 110) rules that since the pan was not used with meat in the past 24 hours (and for that reason the blintzes are kosher and may be eaten), the pan is not treated as a non-kosher vessel and
hagalah suffices. (After 24 hours, the meat flavor that was in the pan is considered stale and will not give flavor to the blintzes.) As a stringency, he recommends that one should perform
hagalah three times.
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