-
1
Combine raspberries, sugar, and lemon juice in a saucepan and mix well. Cover and refrigerate overnight.
-
2
Inspect 3 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.
-
3
Slowly bring raspberry mixture to a boil and simmer uncovered over medium heat until the mixture is no longer liquid, 40 minutes to 1 hour. Stir every few minutes and skim off any foam with a ladle or a large spoon.
-
4
Ladle raspberry jam immediately into the prepared jars, filling to within 1/4 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 spills. Top with lids and tightly screw on rings.
-
5
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 10 minutes.
-
6
Remove the jars from the stockpot and place onto a cloth-covered or wood surface, several inches apart. Let rest for 24 hours without moving the jars. Gently 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 area.
