How to Make Black Currant Jam in Canada (Cassis)
Black currants are one of the highest-pectin and most acidic fruits grown in Canada, so black currant jam sets reliably with no commercial pectin. Simmer about 4 cups of black currants with roughly 1 cup of water for 10 to 15 minutes first to soften the tough skins, then add about 3 to 4 cups of sugar and boil hard until it passes the cold-plate set test. Ladle into 250 mL Bernardin jars leaving 6 mm headspace and process in a boiling water bath for the time in your Bernardin edition, adjusted for your altitude. The flavour — deep, tart, and slightly resinous — is what French cooks call cassis.
Black currants are a July fixture in Canadian cottage gardens and Prairie yards — and an acquired-taste superpower in the preserving kitchen. Too sharp to eat by the handful, they make a jam of extraordinary depth, and because they’re so high in natural pectin and acid, that jam sets with no commercial pectin and almost no fuss.
This guide covers the traditional cook-to-set method. No invented numbers — for your exact processing minutes, use your edition of Bernardin and the altitude-adjustments guide.
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Why black currants are easy to set
Jam needs pectin, acid, and sugar to gel. Black currants (Ribes nigrum) bring the first two in spades — they’re among the highest-pectin, highest-acid fruits grown in Canada. That’s why the classic recipe skips commercial pectin entirely, and why a spoonful of black currants is a traditional trick for rescuing a low-pectin batch of something else.
What you need
- About 4 cups black currants, stripped from the stems (fresh or frozen — frozen works well)
- About 1 cup water for the initial simmer
- About 3–4 cups sugar
- Bernardin 250 mL regular-mouth jars, fresh SNAP lids, bands
The Canadian standard jam jar — right yield for a single currant batch and small enough to finish while the flavour's fresh. SNAP lids single-use; buy fresh.
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The method
- Stem and rinse. Drag a fork down each strig to strip the currants; rinse.
- Soften the skins. Simmer the currants with about 1 cup water for 10–15 minutes until the skins are soft. Don’t skip this — sugar added to un-softened skins makes them tough and chewy.
- Add sugar. Stir in the sugar (and optional 1 tbsp bottled lemon juice). Dissolve, then bring to a hard rolling boil.
- Cook to set. Boil hard, stirring often, until it passes the cold-plate set test — a chilled spoonful wrinkles when you push it.
- Jar. Ladle into hot 250 mL jars leaving 6 mm headspace, wipe rims, apply fresh SNAP lids fingertip-tight.
- Process in the boiling water bath for the time in your Bernardin edition, adjusted for your altitude band.
- Cool 12–24 hours; confirm each lid sealed.
Variations
- Black currant–raspberry — a classic pairing; the raspberry softens the sharpness.
- Spiced cassis — a small cinnamon stick or a splash of crème de cassis stirred in at the end (for personal-use jars; alcohol additions aren’t part of the tested process).
- Red currant — milder and even higher in pectin; better as a clear jelly.
Next steps
- How to make red currant jelly — the clear, classic companion preserve
- How to make gooseberry jam — the other tart July Ribes berry
- Why didn’t my jam set? — the cold-plate test and salvage paths
- Canadian altitude adjustments — for your processing time
- Water-bath canning pillar — the full method
Frequently asked questions
Do I need pectin for black currant jam?
No. Black currants (Ribes nigrum) are among the highest-pectin and highest-acid fruits you can grow in Canada, so the traditional jam needs no commercial pectin at all — it sets on its own with just sugar and a hard boil. That high natural pectin is also why black currant is a classic fruit to pair with low-pectin fruits to help them set.
Why do I simmer the currants in water before adding sugar?
Black currant skins are tough, and sugar added too early sets them hard and chewy. Simmering the currants with a little water for 10 to 15 minutes first softens the skins so the finished jam has a pleasant texture. Add the sugar only after the skins have softened, then boil hard to the set point.
Why is black currant jam so tart?
Black currants are naturally very high in acid — that's part of what makes them set so easily and keeps them safely acidic for water-bath canning. The tartness is the point; cassis (the French name) is prized for that deep, sharp, almost resinous flavour. The full sugar quantity in the recipe balances it; don't cut the sugar, since it's part of what makes the gel form.
Sources
- Bernardin Complete Book of Home Preserving (latest edition)
- Health Canada — Food safety for home canning