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Peach Sauce Preserved
Take thoroughly ripe fruit, pare, stone, and cook slowly an hour. Add sugar in proportion of three-fourths pound to each four pounds of peaches. For immediate table use it will not require long cooking, but for putting up it must become dark in colour and free of juice. Seal while hot.
This is a peach butter in all but name — fruit cooked down until the juice is gone and the colour darkens. The cooking is sound; the preserving instruction at the end is the problem.
- Why the sealing fails"Seal while hot" is open-kettle canning: hot preserve poured into jars and capped, with no boiling-water process afterward. The jar cools, draws a partial vacuum, and appears sealed, but nothing has sterilised the headspace, the rim, or the underside of the lid. Mould and yeast colonise the surface of low-sugar fruit butters stored this way, and a false seal can hold for months before failing.
- The sugar is too low to preserveThree-quarters of a pound of sugar to four pounds of peaches is roughly 19 percent by weight of the fruit. A true preserve or jam runs at or near equal weights of sugar and fruit, and it is that concentration — not the sealing — that suppresses spoilage. This mixture has the sugar level of a sauce, not a preserve, and will not keep on a shelf.
- For shelf storage, use a current recipePeach butter can be safely canned, but it requires a tested modern recipe with a specified jar size and a measured boiling-water processing time. Take that from a current source rather than adapting the passage above.
- What "sauce" meant hereIn nineteenth-century American usage a fruit "sauce" is stewed fruit, served alongside meat or as a plain dessert with cream — the same sense preserved in apple sauce and cranberry sauce. It is not a pouring sauce.
- Slow cooking and "free of juice"The hour of slow cooking breaks the fruit down before sugar is added; sugar added early tends to firm the fruit and slow its collapse. "Dark in colour and free of juice" is the real endpoint — the fruit has darkened and reduced to a spreadable mass with no free liquid pooling when a spoon is drawn through it.
- ParingRather than peeling with a knife, blanch ripe peaches thirty to sixty seconds in boiling water and drop them into cold; the skins slip off. Freestone varieties stone easily, clingstones do not.
- YieldThe recipe gives no yield. Four pounds of peaches cooked to this stage will reduce sharply — expect on the order of a pint to a pint and a half, depending how far it is taken.
Fruit "sauces" and butters occupy the ground between the daily table and the storeroom, and this entry does both jobs in one paragraph — short cooking for supper tonight, long cooking for the jar. Reduction is doing much of the work here, since the sugar is too low to preserve on its own: driving off water concentrates the fruit's own acid and solids, which is the same principle behind apple butter, the far commoner American version of this technique. Peaches reached the Americas with Spanish colonists and had naturalised widely in North America by the eighteenth century, and by the time compilations of this sort were printed the fruit was cheap and abundant in season and worthless out of it, which is precisely the condition that generates preserving recipes. The confident "seal while hot" reflects the open-kettle method common in home canning before the boiling-water bath became standard household advice in the early twentieth century.