Jars with two-piece metal lids and metal screw-bands (called “rings”) are recommended. Wash the jars and prepare the lids according to the manufacturer’s instructions. A dishwasher may be used to wash the jars and hold them hot until ready to be filled, but dishwashers cannot be used for canning. Glass jars can be used many times, but lids can be used once.
- Most lids do not require heating before placing them on the jar.
Tip: Examine the top of a standard Mason-style canning jar. It has threads made of glass where the screw band is tightened. The thread closest to the top of the jar is ¼ inch from the rim, the second thread is ½ inch from the rim and the third thread is 1 inch from the rim. Use these measures to help determine how high to fill the jars, or use a special canning tool to help determine headspace. The recipe provided recommends a 1-inch headspace.
After filling, wipe the jars clean and apply the lids and rings. Tighten the screw band fingertip-tight.
Preheat boiling water canner to 180 degrees Fahrenheit, lower sealed jars onto the canner rack and add to the water. Add more water if needed so the water level is 1 to 2 inches above top of the jars. When water begins to boil, lower the heat, maintain a gentle boil and process for the recommended time.
After processing, turn off the heat, remove the lid from the canner and allow it to stand for 5 minutes. Remove the jars from the water using a jar lifter, place on a towel or hot pad and let air-cool for 12 to 24 hours. Remove the screw bands and check the lid seals. The center of the lid should be indented or concave. Label and store in a cool, dark place for up to one year.
What if a jar does not seal?
Store unsealed jars of food in the refrigerator and consume within several days. The contents of the jar can be frozen in a freezer container.