Always Start with a Tested Recipe
Body
All safe food preservation begins with using tested recipes and properly working equipment. These recipes have been specifically designed and scientifically tested to ensure a safe, quality product when followed exactly. Processing times may vary depending on the product, the size of the container used, and the altitude (elevation in feet above sea level) where you live.
Recipe Source
These tested, evidence-based recipes from the National Center for Home Food Preservation at University of Georgia Extension have been adapted from the Complete Guide to Home Canning, Agriculture Information Bulletin No. 539, USDA, revised 2015.