Ile Flottante

Ingredients

Equipment Needed

• •Deep 15 cm round cake tin
• •Stand mixer or electric hand mixer
• •Fine-mesh sieve
• •Instant-read thermometer
• •Long serrated knife
• •Pastry brush
• •Offset spatula
• •Shallow rimmed pedestal dish or cake stand

Instructions

1. 1

   Build the Savoy batter

   Heat the oven to 175°C or 350°F. Butter a deep 15 cm round cake tin and line its base and sides with parchment. Beat the yolks with half the caster sugar until pale, thick, and able to fall from the whisk in a ribbon. In a clean bowl, whip the whites with the salt to soft peaks, then add the remaining sugar gradually and continue only until the whites are glossy and hold a medium peak. Fold one-third of the whites into the yolks to loosen them, then fold in the rest without pressing out their air. Sift the flour and cornstarch over the mixture in three additions and fold just until no dry pockets remain.

   The batter rises on trapped air. Fold from the bottom of the bowl and turn the bowl as you work; stirring in circles knocks out the very thing holding the biscuit aloft.
2. 2

   Bake and cool

   Transfer the batter to the tin, smooth the top lightly, and bake for 30 to 35 minutes. The biscuit is ready when it is evenly gold, springs back under a fingertip, and a fine skewer leaves the centre clean. Cool in the tin for 10 minutes, then turn it onto a rack and remove the parchment. Let it cool completely. For the best texture, leave it loosely covered at room temperature until the next day; do not seal it airtight, because the point is to lose moisture.

3. 3

   Cook the custard

   Set aside 2 tablespoons of the milk and keep it cold. Scrape the vanilla seeds into the remaining milk, add the pod, and bring it just below a simmer. Cover, remove from the heat, and infuse for 10 minutes. Whisk the yolks, sugar, and pinch of salt until smooth, then pour in the hot milk gradually while whisking. Return everything to low heat and stir constantly until the crème anglaise (English custard) reaches 82 to 84°C or coats the back of a spoon while a finger drawn through it leaves a clean path. If fine curds appear, remove it from the heat immediately, strain it into a cold bowl, and blend in a spoonful of the reserved milk. Ça se rattrape. Hard scrambled curds have gone beyond rescue, so keep the heat gentle. Cool the custard over an ice bath, cover its surface, and chill for at least 2 hours.

   A crème anglaise thickens by cooking the yolks gently, not by boiling away liquid. Once it approaches the proper temperature, every few seconds matter.
4. 4

   Prepare the fillings

   Combine the Kirsch and maraschino liqueur in a small jug. Warm and sieve the apricot jam so it is perfectly smooth, then let it cool until fluid but no longer hot. Reserve 2 tablespoons of the currants for the finish. Keep the remaining currants, chopped almonds, and slivered pistachios in separate bowls so the stacking can proceed without delay.

5. 5

   Slice and saturate

   Trim only the driest cap from the biscuit, then use a long serrated knife to cut it horizontally into six thin rounds, keeping them in order. If the biscuit was baked today, arrange the slices on racks and dry them in a 120°C or 250°F oven for 15 to 20 minutes, turning once; they should feel dry and resilient without taking more colour. Cool completely. Brush both sides repeatedly with the combined liqueurs, pausing between passes so the liquid travels inward. Saturate the biscuit, but leave no puddles. If a slice tears, place it where it belongs and use the jam as adhesive during stacking. Ça se rattrape.

6. 6

   Rebuild the island

   Place the bottom round on a shallow rimmed pedestal dish or cake stand. Coat it with a thin, complete layer of apricot jam, then scatter over one-fifth of the filling currants and chopped almonds. Repeat with the remaining rounds, aligning each carefully so the original outline of the biscuit returns. Coat the top with the last of the jam. Press very gently to settle the layers, then chill for 30 minutes. The thin slicing, saturation, jam, fruit, nuts, and reconstruction are the dish itself; keep every layer.

7. 7

   Whip the Chantilly

   Whip the cold cream with the icing sugar and vanilla until the crème Chantilly (sweetened vanilla cream) holds a smooth medium peak. It must spread without running and remain supple enough to coat the cake without tearing it. If the cream turns grainy, stop beating and fold in a spoonful of the reserved cold milk until it becomes smooth again, then finish by hand. Ça se rattrape.

8. 8

   Mask and chill

   Cover the reconstructed biscuit completely with a generous, even layer of Chantilly, filling every seam and smoothing the surface with an offset spatula. Scatter the slivered pistachios and reserved currants over the cream, allowing them to fall naturally rather than arranging them one by one. Chill the finished island for at least 1 hour so the layers settle and the Chantilly firms enough to slice cleanly.

9. 9

   Float and serve

   Remove the vanilla pod and whisk the chilled crème anglaise until smooth. If it has tightened in the cold, add the remaining reserved milk a little at a time until it pours in a thick ribbon. Just before serving, pour the custard around the base of the cake, not over the Chantilly, until the island sits in a generous ivory pool. Cut with a thin knife wiped between servings, giving each guest both layered biscuit and custard. À table!

Chef Tips

• •Here currants means the tiny dried grapes sold as Zante or Corinth currants, not fresh red or black currants. Their concentrated tartness belongs between the jammed layers and against the sweet cream.
• •Use both Kirsch and maraschino. Kirsch brings the dry perfume of cherry fruit and stone; maraschino contributes sweetness and its almond-like edge. One cannot quietly stand in for the other.
• •The source also permits raspberry syrup around the island. This version follows the vanilla crème anglaise path, which gives the liqueur-soaked biscuit a softer, more generous landing.
• •Pour the custard around the island only when the dessert goes to the table. Given an hour together, the custard and Chantilly lose their clean boundary and the lower layers become too soft.
• •Keep leftovers covered and chilled, and eat them within a day. The flavours deepen, but the carefully rebuilt biscuit continues drinking everything around it.

Advance Preparation

• •Bake the Biscuit de Savoie one day ahead and leave it loosely covered at room temperature. This natural drying gives the best absorption and removes the need for the low-oven step.
• •The crème anglaise can be prepared up to two days ahead. Press reusable wrap or parchment directly onto its surface and keep it cold.
• •The island can be layered, masked with Chantilly, garnished, and chilled up to 6 hours before dinner. Keep it lightly covered and add the custard at the table.

Frequently Asked Questions

Nutrition Information

1 serving (about 360g)