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Biscuits, Venitienne
Four egg yolks, two ounces fine sugar, two gills thick cream whipped, half a vanilla stick and one and a half ounces candied marrons very finely chopped up. Place the egg yolks, sugar, marrons and vanilla in a copper basin. Set the basin on the corner of the hot range, and with a wire whisk sharply beat it for eight minutes. Place the basin on the ice and continually whip it until thoroughly cold. Remove the vanilla, add the whipped cream; gently mix with a skimmer for one minute. Then fill six individual paper ice-cream cases, three inches long by one and a half wide; neatly smooth the surface of each with the blade of a knife. Place them carefully into a small freezer and put the freezer in a small ice-cream tub with plenty of broken ice and rock salt; cover the freezer and let freeze for two hours. Remove the biscuits, dress on a cold dish with a folded napkin and serve.
This is a biscuit glacé — a still-frozen mousse, not a churned ice cream. Nothing here needs an ice-cream machine; the aeration comes entirely from the beaten yolks and the whipped cream.
- The measurementsA gill is half a cup, so two gills of cream is one cup (240 ml), whipped to soft peaks. Two ounces of sugar is about 60 g (a scant third of a cup) and an ounce and a half of marrons about 40 g.
- MarronsCandied chestnuts, sold as marrons glacés or as chestnut pieces in syrup. Drain and blot syrup-packed ones before chopping, or the mixture will slacken.
- Half a vanilla stickHalf a vanilla bean, split so the seeds escape, and fished out again before the cream goes in. A teaspoon of good extract stirred in at the cold stage is the honest substitute.
- The hinge: heat control"The corner of the hot range" means gentle, indirect heat. Set the bowl over barely simmering water and whisk without stopping; the yolks should thicken to a ribbon at around 160F/71C, which also settles the food-safety question. Direct heat or a wandering whisk gives sweet scrambled egg.
- Copper basinCopper conducts evenly, and copper bowls are traditionally credited with helping egg foams, though that effect is best documented for whites; a stainless bowl over a water bath does the job. The cooling step matters as much as the heating: whip over an ice bath until the base is genuinely cold, or the whipped cream will collapse into it.
- FoldingA "skimmer" here is a flat perforated spoon used to fold, not stir. A rubber spatula and a light hand for under a minute is the modern equivalent.
- FreezingThe ice-and-rock-salt freezer was simply the coldest box available. Fill the cases, smooth the tops, and freeze on a level tray for three to four hours in a domestic freezer, covered once firm. No churning at any point.
- Cases and yieldSix paper cases 3 by 1.5 inches — modern soufflé or large muffin papers, or small ramekins, are close enough. Serves six, and it wants to sit five minutes before eating; straight from a modern freezer it is harder than the original ever was.
The biscuit glacé belongs to the family of still-frozen desserts that classical French kitchens set apart from ice cream proper: a cooked yolk-and-sugar foam lightened with whipped cream, packed into small rectangular paper cases and frozen without churning. The name is generally explained by the shape and the case, which made the finished sweet look like a small sponge biscuit rather than a scoop, and nineteenth-century menus list dozens of them under flavour or place names — Tortoni, Marquise, Napolitaine, Venitienne — where the label indicates the garnish or the house style rather than any documented origin. What identifies this one is the marron: candied chestnuts, long associated with Lyon and Piedmont. The recipe's assumptions about equipment suggest a rough date — a copper basin, a range with a cooler corner, and a tub of broken ice and rock salt were the ordinary furniture of a professional pastry department before mechanical refrigeration, and the two-hour freeze reflects how slowly a salt-and-ice bath worked.