Loganberry Jam

1 . Stage

Inspect seven 8-ounce jars for cracks and rings for rust, discarding any defective ones. Immerse in simmering water until jam is ready. Wash new, unused lids and rings in warm soapy water.

2 . Stage

Crush berries in a bowl. Place 1/2 of the crushed berries into a sieve or cheesecloth to remove some seeds if desired. Transfer all berries to a large pot.

3 . Stage

Stir in sugar and add butter to reduce foaming if desired. Bring mixture to a full rolling boil on high heat, stirring constantly. Stir in pectin quickly. Return to a full boil and boil for exactly 1 minute, stirring constantly. Remove from the heat and skim off any foam with metal spoon.

4 . Stage

Ladle jam into hot, sterilized jars, filling to within 1/8 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.

5 . Stage

Place a rack in the bottom of a large stockpot and fill halfway with water. Bring to a boil and use a holder to lower jars 2 inches apart into the boiling water. Pour in more boiling water to cover jars by 1 to 2 inches. Bring to a rolling boil, cover, and process for 5 minutes.

6 . Stage

Remove the jars from the stockpot and let rest, several inches apart, for 24 hours. Press the center of each lid with a finger to ensure the lid does not move up or down. Remove the rings for storage and store in a cool, dark place for up to 1 year.