Rhubarb Blackberry Jam Recipes

Steps:

• Toss the rhubarb, strawberries, sugar, lemon zest and juice and 3/4 teaspoon salt in a large saucepan to combine, then mash slightly to release some of the berry juice. Set aside for 10 minutes to allow the mixture to macerate and the sugar to dissolve. Meanwhile, place a small plate in the freezer to chill; this will be used to test the doneness of the jam.
• Place the saucepan over medium-high heat. (See Cook's Note for flavor additions.) Bring the mixture to a boil and then reduce the heat to medium low, stirring frequently. Continue to cook until the jam becomes thick and syrupy, about 1 1/2 hours. To test doneness, place a small amount of the jam onto the chilled plate and freeze for 2 minutes. Drag your finger or spoon through the jam. If the jam holds its shape and thickness, remove from the heat. If it's runny, continue to cook and test again in 5-minute increments. Once the jam has reached the right consistency, transfer to jars and cool completely before storing, covered tightly. Jam will keep in the refrigerator for up to 6 months.

Steps:

• Place the sugar and cassis in a large (8-by-4-inch) heavy-bottomed saucepan. Add the rhubarb, blueberries, apple, and lemon zest and toss well to coat the fruit with the cassis and sugar. Cover the pot and cook over medium heat for 5 to 10 minutes, until there is a lot of liquid and it comes to a full boil. Lower the heat and cook uncovered at a low boil for 35 to 40 minutes, stirring occasionally, until the fruit has disintegrated and the mixture has thickened. (I test a little by putting some jam in a dish in the freezer to check the consistency when it cools.) If necessary, cook for another 5 minutes. Set aside to cool, then refrigerate.

Steps:

• Combine the rhubarb, sugar and blueberry pie filling in a large pot. Bring to a rolling boil over medium-high heat, and boil for 10 minutes longer. Stir in dry gelatin mix until dissolved. Transfer to sterile jars or freezer tubs, and cool. Freeze any jam you don't intend to use right away.

Steps:

• Wash jars and screw bands in hot soapy water; rinse with warm water. Pour boiling water over flat lids in saucepan off the heat. Let stand in hot water until ready to use. Drain well before filling.
• Mix rhubarb, sugar and water in large saucepan. Cook on high heat 2 min. or until sugar is dissolved, stirring constantly. Reduce heat to medium; cover and cook until rhubarb is tender, stirring occasionally. Uncover; cook an additional 12 to 15 min. or until mixture is slightly thickened, stirring occasionally. Remove from heat.
• Add gelatin; stir until dissolved. Skim off any foam with metal spoon.
• Ladle immediately into prepared jars, filling to within 1/4 inch of tops. Wipe jar rims and threads. Cover with two-piece lids. Screw bands tightly. Turn jars upside-down. After 5 min., turn upright. Or, follow water bath method recommended by USDA. Cool. Store in refrigerator.

Steps:

• Combine rhubarb, sugar, raspberries, and lemon juice in a large pot. Let sit until sugar begins to dissolve, about 5 minutes. Bring to a boil; cook, stirring often, about 15 minutes. Add raspberry-flavored gelatin; stir until dissolved, 1 to 2 minutes. Remove jam from heat.
• Pack jam into hot, sterilized jars, filling to within 1/4 inch of the top. Wipe the rims of the jars with a moist paper towel to remove any residue. Top with lids and screw on rings.
• Place a rack in the bottom of a large stockpot and fill halfway with water. Bring to a boil and place jars 2 inches apart into the water using a holder. Pour in more boiling water if necessary to bring the water level to at least 1 inch above the tops of the jars. Bring the water to a rolling boil, cover the pot, and process for 10 minutes.
• Remove the jars from the stockpot and place onto a cloth-covered or wood surface, several inches apart, until completely cool, about 2 hours. Press the top of each lid with a finger, ensuring that the seal is tight. Store in a cool, dark area.

Steps:

• Bring boiling-water canner, half full with water, to simmer. Wash jars and screw bands in hot soapy water; rinse with warm water. Pour boiling water over flat lids in saucepan off the heat. Let stand in hot water until ready to use. Drain jars well before filling.
• Chop unpeeled rhubarb finely. Place rhubarb and water in 4-qt. saucepan. Bring to boil on high heat. Reduce heat to medium; simmer 2 min. or until rhubarb is tender. Measure exactly 4-1/2 cups prepared rhubarb into 6- or 8-qt. saucepot.
• Stir pectin into prepared rhubarb in saucepot. Add butter to reduce foaming. Bring to full rolling boil (a boil that doesn't stop bubbling when stirred) on high heat, stirring constantly. Stir in sugar. Return to full rolling boil, stirring constantly. Boil exactly 1 min., stirring constantly. Remove from heat. Skim off any foam with metal spoon.
• Ladle immediately into prepared jars, filling to within 1/4 inch of tops. Wipe jar rims and threads. Cover with two-piece lids. Screw bands tightly. Place jars on elevated rack in canner. Lower rack into canner. (Water must cover jars by 1 to 2 inches. Add boiling water if necessary.) Cover; bring water to gentle boil. Process 10 min. Remove jars and place upright on a towel to cool completely. After jars cool, check seals by pressing middles of lids with finger. (If lid springs back, lid is not sealed and refrigeration is necessary.)