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Plain Jelly
Pare thinly the rinds of two oranges and one lemon and put them into a saucepan with one breakfast cupful of powdered sugar, one-fourth ounce of cinnamon broken into small pieces, half a dozen cloves, a small blade of mace, the broken shells and whites of two eggs, one and one-half ounces of gelatine and one and one-half pints of water. Whisk all over the fire until boiling, then move it to the side and simmer for ten minutes; cover with one teaspoonful of cochineal or caramel, strain through a jelly-bag two or three times, pour it into a mould and leave till set before pouring out.
A clarified moulded gelatin dessert of the sort that anchored Victorian and Edwardian dessert tables. The whole point is transparency, and that comes from the egg-white raft and repeated straining.
- The hinge: do not disturb the raftWhisk only until it reaches a boil, then stop whisking entirely and let it barely simmer. The coagulating egg white and shell trap the cloudiness; stirring after it sets breaks it up and the jelly stays murky no matter how often you strain.
- Gelatine quantityOne and a half ounces is about 42 g, roughly six standard 7 g envelopes, to three cups of liquid. That is a stiff, sliceable, unmould-and-hold jelly by period taste. For a modern spoonable set, half that amount to the same liquid is closer to current expectations.
- Breakfast cupfulA breakfast cup runs larger than a teacup, generally taken as 8 to 10 fl oz. Read it as a full cup of sugar, about 200 g. "Powdered" here means finely ground white sugar, not the cornstarch-cut confectioners' sugar sold under that name today.
- PintsOscar is working in US measure, so one and a half pints is 24 fl oz, three cups. If you follow a British edition of a contemporary book the same words mean 30 fl oz.
- "Cover with" the colouringRead this as colour with. Cochineal is carmine, the red extract of scale insects, still sold as a liquid food colour and worth flagging to guests who avoid insect-derived ingredients. Caramel means burnt-sugar colouring, which gives an amber jelly rather than a pink one; either is optional.
- Zest, not pith"Pare thinly" is doing real work. Any white pith carried over turns the finished jelly bitter, and bitterness is very exposed in something this plain.
- StrainingA jelly-bag is a cone of flannel or several layers of damp muslin in a sieve. Pour the first pass back through the same bed of egg-white sediment for the second and third passes, and let it drip rather than squeezing.
- Moulding and yieldThree cups of liquid fills a one-quart mould with room to spare and serves six to eight. Chill at least four hours, ideally overnight. Dip the mould briefly in hot water and invert; the classic mould has no non-stick coating and a light film of neutral oil helps.
Clear moulded jelly was a marker of a well-run kitchen long before packaged gelatin made it easy. Through the eighteenth and early nineteenth centuries the setting agent was boiled calf's foot or isinglass from sturgeon, both of which had to be clarified with egg white and strained through flannel to reach transparency; commercial sheet and powdered gelatine, widely available by the later nineteenth century, kept the ritual while removing the days of boiling bones. This recipe is the plain version, and its flavouring is straightforwardly old-fashioned: citrus peel with cinnamon, cloves and mace, a spice trio often said to descend from earlier spiced wines and possets. Cochineal had been the standard red food colour in European kitchens since Spanish trade brought it from Mexico, and it was among the colours available in a hotel kitchen of Oscar Tschirky's era, when the Waldorf's pastry department would have turned out moulded jellies by the dozen for banquet service.