Plum Jelly

Gather all ingredients.

Combine plums, sugar, and water in a large pot over medium-high heat. Bring to a boil, stirring until sugar dissolves. Lower heat to medium and cook, stirring occasionally to prevent sticking, until mixture has thickened to desired consistency, 30 to 40 minutes.

Meanwhile, inspect five (½-pint) jars for cracks and rings for rust, discarding any defective ones. Immerse in simmering water until jelly is ready. Wash new, unused lids and rings in warm soapy water.

Remove jelly from heat and skim off any heavy foam. Ladle hot jelly into hot, sterilized jars, filling to within 1/2 inch of the top. Run a clean knife or thin spatula around the insides of the jars to remove any air bubbles. Wipe rims with a moist paper towel to remove any residue. Top with lids and screw rings on tightly.

Place a rack in the bottom of a large stockpot and fill halfway with water. Bring to a boil and lower jars 2 inches apart into the boiling water using a holder.

Pour in more boiling water to cover jars by at least 1 inch. Bring to a rolling boil, cover, and process for 15 minutes.

Remove the jars from the stockpot and let rest, several inches apart, for 12 to 24 hours. Store in a cool, dark area.