Glace des Gourmets

Ingredients

Equipment Needed

• •1.5-litre bombe mould or smooth stainless-steel bowl
• •1-litre ice-cream maker, or a shallow metal pan and food processor
• •Instant-read thermometer
• •Food processor
• •Fine-mesh sieve
• •Flexible spatula
• •Silicone mat or baking parchment
• •Chilled rimmed tray
• •Long slicing knife

Instructions

1. 1

   Chill the equipment

   Set a 1.5-litre bombe mould or a smooth stainless-steel bowl in the freezer for at least 30 minutes. Chill the final serving platter and a rimmed tray as well. Clear enough freezer space to keep the mould level, because once layering begins there should be no search for somewhere to put it.

   Metal conducts cold quickly and releases cleanly after a brief application of warmth. A glass bowl is slower to freeze and more reluctant to let go.
2. 2

   Make the almond pralin

   Heat the oven to 350°F (180°C). Toast the almonds until pale gold and fragrant, 7 to 9 minutes, then keep them nearby. Combine the ¾ cup sugar and water in a light-coloured saucepan, bring to a boil, and cook without stirring until the syrup turns a clear amber. Add the warm almonds, stir quickly to coat them, and spread the mixture thinly on parchment or a silicone mat. This is pralin, the caramelized almond preparation that supplies both the shell's flavour and its final coat.

   If the sugar crystallizes before colouring, cover the pan for 30 seconds so condensation washes the sides, then continue uncovered. If it seizes around the almonds, return it to low heat until the sugar melts again. Burnt caramel cannot be repaired, so discard anything black or bitter and begin that small batch again.
3. 3

   Divide the pralin

   Let the pralin cool until completely hard. Break it into pieces, then grind roughly one-third to a fine, sandy powder in a food processor. Chop or pulse the remainder into irregular almond splinters, mostly ⅛ to ¼ inch (3 to 6 mm), large enough to remain crisp under the teeth but small enough to cling to the bombe. Keep both portions dry and separate.

4. 4

   Build the chestnut custard

   Warm the milk and ½ cup cream until small bubbles gather around the edge. Whisk the yolks with the ¼ cup sugar, then pour in the hot dairy gradually while whisking. Return everything to gentle heat and stir constantly until the custard reaches 180°F (82°C) and coats the spoon. Remove it immediately, whisk in the chestnut purée until smooth, and chill the bowl over ice. Stir in the rum only when the base is cold, which keeps its aroma lively.

   If the custard becomes slightly grainy, take it off the heat, blend it briefly, and pass it through a fine sieve. Ça se rattrape. Rum softens frozen mixtures, so measure it; generosity with the bottle gives a bombe that refuses to stand.
5. 5

   Churn the chestnut ice

   Churn the thoroughly cold chestnut base until dense, smooth, and able to hold a soft ridge, usually 20 to 25 minutes. Transfer it to a shallow container and freeze for 20 to 30 minutes. You want spreadable ice, not liquid cream and not a solid block. If it becomes too firm while you work, give it 5 minutes in the refrigerator and stir it firmly with a spatula.

6. 6

   Clothe the mould

   Fold the finely ground pralin into the softened vanilla ice cream. Chemiser le moule (clothe the mould) by spreading the pralined vanilla over the bottom and up the sides in an even layer about ⅜ inch (1 cm) thick, reserving about ½ cup (120 ml / 100 g) to close the base later. The book directs the cook to Another Method of Preparing Aspics de Filets de Soles (No. 916) for this same cold-mould action. It is a technique citation only; no sole, fish jelly, or savoury component enters the dessert. Freeze the clothed mould for 30 minutes.

   Hold the mould up to the light and inspect the shell. Patch thin or translucent areas with more ice cream and freeze again. If the lining slides, it is too warm; return it to the freezer for 10 minutes, then press it back into place.
7. 7

   Whip the Chantilly

   Reserve 1 tablespoon of the cold cream, then whip the remainder with the confectioners' sugar and vanilla bean paste until it holds firm but supple peaks. Chantilly is sweetened, flavoured whipped cream, and here it must be sturdy enough to form a layer without becoming buttery. If it goes grainy from overwhipping, fold in the reserved cream a teaspoon at a time until it smooths. Ça se rattrape.

8. 8

   Build alternating layers

   Spread one-third of the rum chestnut ice inside the frozen shell, pressing it gently into the curve without disturbing the vanilla. Freeze for 15 minutes, then add half the Chantilly and freeze again. Repeat with chestnut ice, Chantilly, and a final chestnut layer, leaving about ⅜ inch (1 cm) below the rim. Spread the reserved pralined vanilla ice cream across the top and join it firmly to the frozen shell, enclosing the filling. Cover and freeze until solid, at least 4 hours.

   Cold pauses between layers are not brigade ceremony. They keep the bands distinct. If one layer smears into the next, level it, freeze for 15 minutes, and continue when the surface is firm.
9. 9

   Unmould and roll

   Spread the almond splinters across the chilled rimmed tray. Wrap the mould for 5 seconds in a towel wrung out in warm water, invert it onto cold parchment, and lift. If it will not release, repeat for 3 seconds rather than applying steady warmth. Using the parchment to limit contact, roll and press the bombe rapidly through the pralined almond splinters until the vanilla shell is covered. A warm hand melts the shell, so work fast. If it softens, stop and freeze it for 20 minutes before finishing the coat.

   Have the coating, platter, and freezer space ready before the mould comes off. This final rush is part of the dish, not performance.
10. 10

    Cut clean wedges

    Transfer the coated bombe to the chilled platter and freeze for 20 minutes to reset its surface. Before serving, let it stand in the refrigerator for 10 minutes. Dip a long knife in hot water, dry it completely, and make each cut in one confident stroke, cleaning and reheating the blade between wedges. Serve at once, while the almonds remain crisp and the layers hold their clean edges. À table!

Chef Tips

• •Use unsweetened chestnut purée, not sweetened crème de marrons. If the sweetened jar is all you can find, omit the sugar from the chestnut custard and expect a slightly sweeter, softer ice.
• •A freezer thermometer earns its place here. The bombe sets best at 0°F (-18°C) or colder, and a crowded freezer may need several extra hours.
• •Without an ice-cream machine, freeze the chestnut base in a shallow metal pan and beat it vigorously every 35 to 40 minutes, three times, before using it. Allow about 2 extra hours; the texture will be less fine, but the flavour remains true.
• •Measure the rum. Its aroma belongs in the chestnut ice, but excess alcohol lowers the freezing point and weakens every layer around it.
• •Serve with a small glass of old rum or demi-sec Champagne. The bombe already carries its own decoration, so it needs no sauce, fruit, or sugared ornament.

Advance Preparation

• •If the ice-cream maker uses a removable freezer bowl, freeze it for at least 24 hours before beginning.
• •The almond pralin can be made up to one week ahead and kept airtight in a cool, dry cupboard. Moisture makes the splinters sticky.
• •The chestnut custard can be cooked and chilled one day ahead. Add the rum before churning.
• •Assemble the bombe up to three days before serving and keep it tightly covered. Apply the almond coat on the day of service so it retains its crisp bite.

Frequently Asked Questions

Nutrition Information

1 serving (about 205g)