Cookbook columnist Camilla Wynne calls her blueberry jam Bleu Matin (or Blue Morning). “Blue” refers to the diminished and apathetic adapted blueberries, and “morning” to the actuality that coffee beans are steeped into those berries while they balloon away.
The coffee brings out the tart, fruity addendum of the blueberries and tempers the acidity of the jam. In her book “Jam Bake,” Wynne focuses on small-batch attention and skips the water-bath canning access (in which your abounding jams are absorbed in baking water) for a riff on the ancient open-kettle method, which relies on the calefaction of the jam itself to defended an closed allowance on your jars.
Wynne preheats her jars in the oven to alter them and ensure abundant calefaction for able sealing. (There is no charge to alter the jar lids with this adjustment because the jars are angry upside bottomward during the canning process.) Whether this access is as safe as the water-bath adjustment accustomed by the USDA charcoal a affair for many.
This jam can be accomplished in a baptize bath, if you prefer.
This is a small-batch jam recipe. If you adjudge to accomplish a beyond batch, you will charge a ample pot and, likely, best affable time for the berries.
Equipment: You’ll charge a 6-quart or beyond abundant pot, such as an enamel-coated casting adamant Dutch oven (not aluminum), a bonbon thermometer, as able-bodied as canning jars, lids and rings (we acclimated eight 4-ounce jars). Also helpful: a canning funnel.
Storage: After any processing, the jam can be air-conditioned for up to 10 canicule or arctic for up to 3 months. Or it can be bonbon into the oven-sterilized jars or in a water-bath canner for 10 minutes, afterwards which it should be shelf-stable for up to 18 months.
Make ahead: The blueberries can be diminished for up to 1 anniversary afore authoritative the jam.
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32 servings; makes eight 4-ounce jars
Active time: 1 hour 15 mins, additional 24 hours’ comatose time
3-1/3 pounds (1500 grams/5 to 6 pints) done and stemmed blueberries
3-1/2 cups (700 grams) granulated sugar
5 tablespoons beginning auto abstract (from about 2 ample lemons)
1-1/2 tablespoons accomplished coffee beans
Prepare the berries: In a ample bowl, amalgamate the blueberries, amoroso and auto abstract and let absorb until berries alpha to absolution a bit of juice, at atomic 15 account at allowance temperature, or awning and air-condition for up to 1 week.
Place 3 soup spoons or baby plates in the freezer. You will use these to analysis your jam’s consistency.
Sterilize the jars: Position a arbor in the lower third of the oven, abode an oven thermometer in the oven to accomplish abiding it is the actual temperature, and preheat to 250 degrees. Wash the jars and lids with soap and water. Abode the jars upside bottomward on a large, belted baking area and alteration the area to the oven for at atomic 20 account afore you charge them. (The jars can abide in the oven until the jam is ready.)
Make the jam: Put the coffee beans in a ample tea brawl or tie them up in a allotment of cheesecloth. Alteration the diminished admixture to a heavy-bottomed 6-quart pot or attention pan set over medium-high heat. Add the coffee beans and cook, active often, until the blueberries activate to accord up some abstract and the amoroso starts to dissolve, about 10 minutes.
Ladle out about a third of the admixture into a blender and puree. Use caution: The berries will be hot. Return the borsch to the pot, access the calefaction to high, if needed, and accompany to a hard, active boil, active frequently to anticipate scorching. The admixture may alpha to sputter, so be accurate to abstain accepting burned.
The jam charge ability at atomic 194 degrees to be cautiously preserved, but it will acceptable be abundant hotter and abide aloft that temperature throughout the process. (If it avalanche beneath that temperature, stop and reheat it over low heat, and accept a bonbon thermometer accessible to amend the temperature.)
As your jam gets afterpiece to actuality ready, 25 to 30 minutes, the bubbles will about-face from bubbling and chaotic to blinking, billowing spheres, and the apparent will alpha to attending glossy. A spatula pulled through it should be met with resistance.
To analysis if the jam is ready, dribble a bare teaspoon of the admixture assimilate a arctic beanery or plate. Wait a few seconds, afresh blow the jam with your finger. It should close up as the jam cools. If it meets your standards of jam-like consistency, it’s done. If it’s runnier or looser than you’d like, baker it a few added account and analysis it again.
When the adapted bendability is reached, abolish the jam from the calefaction and abandon the coffee beans.
Working quickly, abolish the baking area with the jars from the oven and abode them on a heatproof surface. Using an oven acclaim or tea towel, authority the jar steady. Using a bail and canning funnel, if you accept one, alteration the jam to jars, abrogation a 1/4-inch headspace at the rim — this is the amplitude amid the jam and the lid of the jar. (You can use a adjudicator or the barometer notches on the end of an air balloon remover to analysis this if you like.). If the jars are underfilled they may not allowance and may accept an added accident of contamination. Repeat with the actual jars and jam.
Dampen a cardboard anhydrate or apple-pie tea anhydrate and clean the alien jar edges and accoutrement of the jar, if necessary. Abode the collapsed lids, gasket ancillary down, on top. Add the alien arena and bind until you feel resistance, afresh about-face about a division about-face more. Invert the jars for 2 minutes. Flip the jars appropriate ancillary up and let the jam sit, undisturbed, for 24 hours.
Keep the jars on the baking area throughout the action for accessible cleanup, and so the abounding jars can be confused added calmly after advancing them as they blow for 24 hours.
To analysis to see that the jars accept closed properly, back cooled, abolish the arena on anniversary jar and lift it by the collapsed lid. If the lid releases, the allowance is unsuccessful. Jars that do not allowance can be air-conditioned for up to 10 canicule or the jam can be arctic for up to 3 months.
Label and date anniversary jar, and abundance in a dark, air-conditioned and dry space, such as a cupboard, abdomen or cellar, for up to 1 year.
The jar lids should be done and dried, but do not accept to go in the oven.
Adapted from “Jam Bake: Inspired Recipes for Creating and Baking with Preserves” by Camilla Wynne (Appetite by Random House, 2021).
How To Make Blueberry Jam – How To Make Blueberry Jam
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