Always consult trusted canning instructions if preserving for long-term storage. If jars are not sterilized for shelf stability, store pickled peppers in the refrigerator for up to three months. Ground mustard may be substituted in emergencies, though this will cloud the brine and alter the intended flavor—using whole mustard seed is strongly recommended. Seed removal from banana peppers is optional; a few remaining seeds do not affect taste or texture. This recipe yields approximately two pints.