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After a successful harvest of marionberries, making jam is a wonderful way to preserve their sweet, tart flavor for months to come. Fresh marionberries are perfect for creating a delicious, homemade jam that captures the essence of summer. Follow these steps to make your own marionberry jam at home.
Gather Your Ingredients and Equipment
- 4 cups fresh marionberries
- 3 cups granulated sugar
- 1/4 cup lemon juice
- 1 package (1.75 oz) fruit pectin (optional for thickening)
- Large heavy-bottomed saucepan
- Sterilized jars and lids
- Jar funnel and ladle
Prepare the Berries
Start by rinsing the marionberries gently under cold water. Remove any stems or damaged berries. Gently crush the berries with a potato masher or fork to release their juices, but leave some whole for texture.
Cook the Jam
In a large saucepan, combine the crushed marionberries, lemon juice, and sugar. Stir over medium heat until the sugar dissolves completely. Bring the mixture to a boil, stirring frequently to prevent sticking. If using fruit pectin for a thicker jam, add it according to the package instructions once boiling begins.
Reduce the heat and simmer the mixture for about 10-15 minutes, stirring occasionally. During this time, the jam will thicken and develop its rich flavor. To test if the jam is ready, place a small spoonful on a cold plate and run your finger through it; if it wrinkles and holds its shape, it’s done.
Jar the Jam
Carefully ladle the hot jam into sterilized jars using a funnel. Leave about 1/4 inch of headspace at the top of each jar. Wipe the rims clean with a damp cloth to ensure a good seal. Place the lids on the jars and screw on the metal bands until just tight.
Process and Store
Process the jars in a boiling water bath for 10 minutes to ensure they are properly sealed. Remove the jars and let them cool completely on a towel or rack. Once cooled, check the seals by pressing down in the center of each lid; it should not pop back.
Label your jars with the date and store them in a cool, dark place. Properly sealed and stored, your marionberry jam can last up to a year. Enjoy spreading it on toast, mixing into yogurt, or using in baking recipes.