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Crab-Apple Jelly
Select fresh, sound fruit, not more than fully ripe. Place one gallon of the fruit in an earthen or porcelain kettle and add one pint of water. Heat slowly until it boils. Continue to cook slowly until the fruit begins to come to pieces, then turn off the juice immediately, pressing the fruit gently back in the kettle as long as the liquor will run off clear. Then strain twice through a fine cloth strainer. Add one pound of the best white sugar for every pound of the juice. Boil ten or fifteen minutes. Skim carefully while boiling.
A classic no-added-pectin jelly that works because crab apples are unusually high in both pectin and acid. The instructions are sound; what they leave out is how to tell when the jelly is done and how to store it.
- The hinge: don't squeeze the fruit"Pressing the fruit gently back in the kettle as long as the liquor will run off clear" is the whole trick. Forcing pulp through the cloth gives a cloudy, sedimenty jelly that no amount of straining afterward will clear. Let it drip and accept a slightly lower yield.
- A gallon of crab applesMeasured by volume, whole and unpeeled, that is roughly 4 to 5 lb of fruit. The fruit is cooked whole, cores and all, since the cores carry much of the pectin; most guidance has you trim stem and blossom ends first, though the recipe does not say.
- Sugar by weight, not volume"One pound of sugar for every pound of juice" means weighing the strained juice. One pound of juice is very close to two cups; note that a cup of sugar weighs only about 7 oz, so measuring a cup of sugar per cup of juice gives somewhat less sugar than the recipe asks for. It will still set, but weigh if you can. "Best white sugar" is simply ordinary granulated.
- Kettle materialEarthenware and porcelain-lined pots were specified because bare iron discolours fruit and reacts with its acid. Stainless steel or enamelled cast iron does the same job. Use a pot far larger than seems necessary; the syrup climbs when it boils hard.
- Ten or fifteen minutes is a guide, not a ruleSetting time depends on how much water the juice carries. Cook at a full rolling boil and test: the jelly is done at 220F at sea level (8F above the boiling point of water where you are), or when it sheets off a cold spoon in two drops that merge and fall together. Undercooked crab-apple jelly stays syrup; overcooked goes gummy and dark.
- SkimmingSkim the foam off near the end rather than continuously. Foam is trapped air and fine pulp, and it is what makes a jar look muddy at the top.
- Storage the book assumes and you should notNineteenth- and early-twentieth-century households sealed jelly under paraffin wax in open glasses. Current practice is to pour into hot sterilised half-pint jars, leave 1/4 inch headspace, and process in a boiling-water bath for 5 to 10 minutes, or simply refrigerate and use within a few weeks.
Crab apples were the fruit of the fence line and the dooryard rather than the orchard, too sour and too small to eat out of hand but loaded with the pectin and acid that make a jelly set on its own. Before commercial powdered and liquid pectin became common in American kitchens in the early twentieth century, cooks relied on high-pectin fruit — crab apples, currants, quinces, underripe apples — to stiffen everything else, and the instruction here to use fruit "not more than fully ripe" reflects that: pectin declines as fruit softens. Its place in a section on preserving, drying and canning is telling. A book of this period treats putting up fruit as an autumn obligation rather than a hobby, and a jelly that needed nothing but fruit, water and sugar was the cheapest sweet thing a household could set on a winter table.