1 1/2 qt. fresh blueberries, crush to equal 4 1/2 c.
2 tbsp. lemon juice
7 c. sugar
2 pouches Certo fruit pectin
1 tsp. butter
12 (8 oz.) or 20 (4 oz.) jars with lids, sterilized

Prepare 8 oz. jam jars by boiling them for 10 minutes. Prepare fruit in large 5-quart pan on stove. Stir sugar into fruit. Mix well and add 1 teaspoon butter. Bring mix to full bubbling mix for 5 minutes over high heat; stir constantly.

Pour Certo (2 pouches) into fruit and continue to boil for 1 minute, stirring constantly. Remove from heat and skim off foam. Ladle into jars, wipe rims of jam. Turn jars upside down for 5 minutes and then turn upright. Let set for 1 hour. Delicious!