Blueberry Jam

Step 1

Prepare home canning jars and lids according to manufacturer’s instructions for sterilized jars. Keep jars hot until filled. Always use new lids.

Step 2

Place berries, lemon juice, butter and pectin in a large pot. Bring mixture to full rolling boil, stirring constantly. Stir in sugar. Return to a full rolling boil and boil exactly 1 min., stirring constantly.

Step 3

Remove from heat and skim off foam. Quickly ladle into the hot jars, leaving ¼-inch of head space at the top. Use a damp cloth to wipe any drips from the top and sides of the jars. Cover with hot lids and tighten rings firmly.

Step 4

Set the hot jars on a rack in a canner or in a large pot of boiling water. The water needs to cover the jars by at least 1-2 inches. Boil the jars for 10 minutes.

Step 5

Remove the jars from the boiling water and set on a towel or rack to cool overnight (but not more than 24 hours).

Step 6

When cool, check the seals. The lids should be down in the center or stay down when pressed. Store in a cool, dark, dry place. Unsealed jars should be refrigerated and used within 3 weeks.