Seedless Blackberry Jelly
- 3 1/2 cups blackberry juice (approximately 3 pints of berries)
- 2 tbsp of lemon juice
- 1 package of fruit pectin (I use Certo liquid fruit pectin)
- 5 cups sugar
- First you will need to smash your berries and extract all the juice that you can from them. Jenny recommends using cheesecloth and smashing your berries in the cloth over a colander set in a large liquid measuring cup (8 cups size) and then wringing them in the cheesecloth over the liquid measuring cup. Once you have 3 1/2 cups of juice you are ready to move to the next step. Measure the sugar and set it aside in a bowl to be used later.
- Fill your canning pot 2/3 full with water and put in on the stove on high heat, keeping the cover on. In another big pot place several clean jars and lids and fill with water. Place this pot on the stove and boil on med-high heat.
- Pour the blackberry juice into a large pot. I would suggest a 6 quart stock pot or larger if you have it. It seems extreme but trust me you will need the space. Add the lemon juice and fruit pectin. Cook on high heat, stirring constantly with a silicone spatula. About 10 minutes. When it starts to boil rapidly, let it boil for a minute.
- Then add 5 cups of sugar all at once. Continue to stir the mixture. The sugar will dissolve and it will be about another 10 minutes of stirring before it starts to boil again. During this phase the jam will “grow” in the pot and use up some of that extra space that you have. Keep stirring until 90% or more of the surface of the jam is made of small boiling bubbles. At this point when it is boiling rapidly again, let it boil for a minute then remove from heat. Turn the heat on your canning pot down at this point so the water is not boiling rapidly when you go to put your filled jars in.
- Working quickly, take the pot of boiling jars and begin removing one jar at a time with jar lifter. Wipe the inside of the jar dry. Fill jar with jam using ladle, leaving a 1/4 inch of headspace. After the jar is filled, wipe the rim clean with a damp cloth and retrieve a hot lid from the pot. Wipe the the lid dry, place it on the jar and tighten a clean ring on it. Once you have enough jars filled to fill your canning pot (mine can hold 12 regular mouth 1/2 pint jars and 8 wide mouth 1/2 pint jars) begin placing them in one at a time using jar lifter. For boiling water method, do not double stack jars. Make sure that water covers the tops of the jars by at least 2 inches. Cover the canning pot with lid and return to boil. When it starts boiling, then you can set your timer and boil for 10 minutes. After 10 minutes, use your jar lifter and carefully remove and set on a wire cooling rack. You should hear the lids pop as they seal as they gradually cool down.
- Once they are cool enough to handle remove the rings to prevent rusting. Leave the jars to cool over night and to finish setting. In the morning double check to make sure each of your jars sealed properly. You can do this by pressing on the center of the lid. If the lid gives and pops back the jar is not sealed. If the lid does not give but stays firmly in place then the jar is sealed. When the jars are completely cool, then the jam in the jars should be set and you can store them in a cool dry place for up to a year.If you have left over jam that doesn’t fill a jar you can place it in a jar or other contain and refrigerate and eat the next day.