Plum Jelly Recipe

The recipe found here is the traditional Certo recipe; however, inverting jars as a method of sealing is less safe and less reliable than the boiling water bath method. It is recommended that jars be prepared by sterilizing either in the dishwasher or in the water bath canner prior to filling. Be sure to pour hot jelly into hot jars to within 1/8" of the top. After preparing rings and lids according to manufacturer's recommendations, quickly place two-part lids onto hot jars and finger tighten. Being sure that the jars are covered with boiling water by at least 1-2 inches, process filled jars for at least 5 minutes or longer depending on your elevation. Remove jars promptly from water bath and let sit undisturbed for 24 hours. Check seals. Unsealed jars must be refrigerated.