I like to combine several types of fruit in jam. This summer jam uses sour cherries
24 ounces fresh sour cherries
1 pint fresh raspberries
10 ounces fresh blueberries
1 (1.75 ounce) package fruit pectin (such as Sure-Jell Premium Fruit Pectin®)
7 cups white sugar
① Inspect 8 half-pint 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 Prepare fruit and measure. Remove pits from cherries and measure 3 cups of pitted sour cherries. Crush raspberries and measure 1 cup crushed raspberries. Mash blueberries and measure 1 cup mashed blueberries.
③ Combine cherries, raspberries, and blueberries in a large pot. Stir in pectin. Slowly bring to a full rolling boil that does not stop bubbling when stirred. Stir in sugar sugar and stir to dissolve. Return to a full rolling boil on high heat and boil for exactly 1 minute, stirring constantly. Skim off any foam with a ladle or a large spoon.
④ Ladle cherry berry 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.
Per Serving: 94calories;0.1g fat;24.3g carbohydrates;0.2g protein;0mg cholesterol;< 1mg sodium.