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Black Currant Jelly
Black currants should be well ripened. Heat in the usual manner, then drain, in a bag.
Measure the juice and allow a cup of sugar to each cup of juice. Let the juice boil rapidly ten minutes, add the sugar, and let boil till the mixture jellies. Black currant jelly, even when made of dripped juice, is always rather dense and the last of the juice is often secured by pressure and used with that dripping from the bag. Black Currant Jelly No. 2 Wash the currants, remove from the stems, and set to cook in a double boiler. When soft, drain in a bag, pressing out all the juice possible. Measure the juice, heat to the boiling point, let boil about five minutes, add an equal measure of hot sugar, and boil as needed. Add water to the pulp in the bag and reboil. Boil this second extraction from ten to twenty minutes, then add an equal measure of hot sugar, and let boil to jelly.
Two versions of the same jelly, written for cooks who already knew how a jelly bag works. The gaps worth filling are the sugar ratio's dependence on pectin, the doneness test, and the sealing step the book assumes you know.
- "Heat in the usual manner"Put the stemmed currants in a heavy pot with a splash of water — about 1/2 cup per pound — crush a few against the bottom to start the juice, then cook covered over low heat until the fruit collapses, roughly 10-15 minutes. Recipe No. 2's double boiler does the same thing more slowly and with no risk of scorching.
- Draining the bagFor a clear jelly, let the fruit drip without squeezing; expect about 1 cup of juice per pound of currants. Pressing, as both versions allow, raises the yield but clouds the jelly — the book notes the jelly is "rather dense" even when made from dripped juice.
- Hot sugarWarming the sugar before it goes in — spread on a tray in a 250F oven for 10 minutes — keeps the boiling juice from dropping off the boil. It is not essential, but it shortens the cooking and so protects the colour.
- Cup for cup is right hereBlack currants are exceptionally high in pectin and acid, so the equal-measure sugar ratio works where it would fail with a low-pectin fruit. Do not increase the sugar to compensate for a slow set; boil longer instead.
- "Boil to jelly" means 220FThe setting point is 8F above the boil, so 220F at sea level, measured on a candy or instant-read thermometer. Failing that, the spoon test: lift the spoon, let the syrup run off, and stop when the last of it falls in a single sheet rather than separate drops. From the sugar going in, this usually takes 8-12 minutes.
- The second extractionRecipe No. 2's trick of adding water to the spent pulp and reboiling pulls out remaining pectin, but the juice is weaker, which is why it wants 10-20 minutes of reduction before the sugar. Keep the two batches separate; the second yields a paler, softer jelly.
- SealingThe book takes canning practice for granted. Ladle the jelly into hot sterilised half-pint jars, leave 1/4 inch of headspace, wipe the rims, and process 5-10 minutes in a boiling water bath, or refrigerate and use within a month.
- YieldRoughly 4 lb of currants and 4-5 cups of juice will give about five half-pint jars from the first extraction.
Black currants were a kitchen-garden staple in Britain and northern Europe long before they were a commercial crop, valued as much for throat syrups and cordials as for the table — the fruit is far too sharp and musky to eat raw in quantity. Over the 1910s and 1920s, Ribes plantings were restricted by both state and federal action — a regime not lifted until the 1960s — because the bushes host white pine blister rust, a fungus that was devastating the timber industry. That is why a fruit routine enough to be described as heated "in the usual manner" became genuinely hard to find in the United States for most of the twentieth century. The recipe's confidence about cup-for-cup sugar and a firm set reflects the fruit itself rather than the author's skill — black currants carry enough pectin and acid to jell reliably without the added lemon or commercial pectin a modern berry jelly usually needs.