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Orange Vinegar
To orange pulp and juice add water and Florida syrup. "Mother" will form in a few weeks and strong vinegar result. (Cover the jar with thin cloth, only, while vinegar is in the making.)
This is less a recipe than a note of a method: the original gives no quantities, no vessel size and no timing beyond "a few weeks." What follows is what a modern cook needs to fill in.
- The missing proportionsNo amounts are given at all. Vinegar making needs enough sugar to ferment to alcohol first, and home guides generally land somewhere between a half and a full cup of sugar or syrup per quart of liquid depending on the strength wanted. Too little and the finished vinegar is weak and vulnerable to spoilage; a working recipe with measured quantities is worth consulting before you commit a jar.
- Florida syrupCane syrup boiled down on Florida and Gulf Coast farms, sold in tins and jugs into the mid-twentieth century. Steen's cane syrup is the closest thing still made; light molasses or plain sugar will ferment, though the flavor is not the same.
- Two fermentations, not oneThe instruction hides a two-stage process. Yeasts convert the sugar to alcohol over one to two weeks, then Acetobacter bacteria convert the alcohol to acetic acid over one to three months. The "few weeks" of the original is optimistic for genuinely strong vinegar.
- Why the cloth coverThis is the hinge of the whole thing. Acetic fermentation is aerobic, so the jar must breathe; a sealed lid stalls it. But the cloth must be fine enough to keep out vinegar flies, which carry spoilage organisms and will find any gap.
- What "mother" isA gelatinous cellulose raft produced by the acetic bacteria. It should be pale, translucent and slippery. Fuzzy growth in blue, green or black is mold, not mother, and that batch goes down the drain.
- Give it a head startAdding a few tablespoons of raw, unpasteurized cider vinegar drops the pH immediately and seeds the right bacteria, which is one of the better defenses against a batch souring the wrong way. Carrying a mother over from an earlier batch was a long-standing household habit, though this note assumes one will simply appear.
- Vessel and placeGlass, glazed stoneware or food-grade plastic; never bare aluminum, copper or iron, which acid attacks. Keep it at 70-80F away from direct light, and wide-mouthed rather than narrow, since surface area drives the acetic stage.
- Judging it doneTaste, and if you want certainty use pH strips or acid titration; culinary vinegar sits near 5 percent acidity. Homemade vinegar of unknown strength should not be used for pickling or canning, where a verified acid level is the whole point of the preservation.
The impulse behind early twentieth-century Florida fruit literature is easy enough to see: the citrus boom produced enormous volumes of culls, drops and juicing leftovers. Fruit vinegars are far older than the Florida groves; the word comes through Old French vin egre, sour wine, and any sweet liquid left open to the air will follow the same path from sugar to alcohol to acetic acid. What dates this particular note is the pairing with Florida cane syrup, a regional sweetener that once stood in for granulated sugar across the Gulf South, and the confident assumption that "mother" would simply arrive on its own -- a household expectation from a time when a vinegar crock was standing equipment rather than a project.