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Baked Custard
Beat the yolks of four fresh eggs at least twenty-five minutes, then add five ounces of pulverized white sugar; then stir into the sugar and eggs one quart of rich milk; when cold, one teaspoonful of rose water, or any extract preferred. Fill the custard cups and place in a stone pan half filled with water, little warm at first-not hot. Put the pan in a rather cool oven, gradually increase to a moderate heat. In about twenty minutes dip a teaspoon into one of the custards to see if it is firm.
A plain yolk custard baked in a water bath, of the sort that appears in nearly every American household book of the period. Most of the work is in the oven management rather than the mixing.
- Beating the eggsTwenty-five minutes of beating yolks by hand was meant to lighten the mixture before whisks were efficient; note that the sugar goes in afterwards, not during. Two or three minutes with a modern whisk or mixer accomplishes the same thing; over-aerating actually encourages a foamy, pitted top.
- Five ounces of sugarWeigh it if you can: 5 oz is roughly 3/4 cup of granulated. "Pulverized" sugar here means finely ground, closer to today's caster than to confectioners' sugar, which contains cornstarch.
- "When cold"The instruction hints that the milk may have been scalded first, though the recipe does not say so. Extracts and rose water are best added off the heat, since their aromatics are volatile. If you use cold milk throughout, add the flavoring at any point.
- Rose waterStill sold, and still assertive. A teaspoon in a quart is on the strong side for modern palates; half that is plenty unless you want the custard frankly floral.
- The water bathA "stone pan" is a heavy earthenware baking dish, and its mass is the point: it buffers the cups against fast temperature swings. Any deep roasting pan works, but the warm-not-hot water start is worth keeping.
- Oven temperaturesThe book gives only "rather cool" and "moderate"; by the usual nineteenth-century reckoning that is somewhere around 300F rising to 325-350F, though such terms were never standardised. In a modern oven there is little to gain from ramping; set it at 325F and leave it. Much above 350F and the eggs are apt to curdle and the custard to weep.
- Doneness and timingTwenty minutes is optimistic for standard 6 oz cups; 35 to 45 minutes is more usual. The custard is done when the edges are set and the center still wobbles as a unit, or at 170-175F on an instant-read thermometer. Carryover heat finishes it.
- YieldOne quart of milk with four yolks fills six to eight custard cups. Four yolks per quart is a soft, spoonable set; add a whole egg or a fifth yolk if you want the custards to unmould.
Baked custard sits at the intersection of nursery food and company food, which is part of what makes a four-ingredient recipe read as something more than plain. The yolk-and-milk custard baked in a water bath is very old European technique, and the American versions of the nineteenth century mainly differ in flavoring: nutmeg for everyday, rose water or a purchased extract for a table where guests were expected. Rose water was among the common sweet flavorings in English and colonial American kitchens well before vanilla became cheap and widely available, and its survival in books this late is a bit of a holdover; by 1900 vanilla extract was displacing it fast. The instruction to beat the yolks twenty-five minutes is a reminder of how much cookbook labor was measured in arm-time, and how much that changed as rotary egg beaters spread.