Genoise with Amaretto Cake

Genoise is the foundation of Italian and French patisserie, a whole-egg sponge cake that climbs in volume on the strength of foamed eggs alone. No baking powder, no chemical lift. This version dresses it up with amaretto brushed between the layers and a whipped chocolate ganache that does duty as both filling and frosting.

The technique is the whole game with genoise. Eggs and sugar warm over a hot water bath to 115F (46C) before whipping. That gentle heat dissolves the sugar and primes the proteins to whip into a stable, voluminous foam that triples in size. Fold the sifted flour and cornstarch in by hand, never by mixer, or you’ll deflate everything.

The overnight chill on the ganache is also key. It needs that time to firm up enough to whip into spreadable, billowy peaks.

A hot 425F (220C) oven sets the delicate crumb fast, locking in the air you whipped in.

Chef Tips

• Use room-temperature eggs. Cold eggs whip slower and never reach full volume.
• Sift the flour and cornstarch three times as written. It looks excessive, but light, aerated dry ingredients fold into the egg foam without crushing it.
• Brush the amaretto on while the cake layers are still warm. A warm sponge drinks up syrup faster and more evenly.

Variations

• Swap amaretto for Grand Marnier and pair with orange-zested ganache.
• Use white chocolate in the ganache and pair with Frangelico for a hazelnut-cream variation.
• Add a thin layer of raspberry preserves between the cake and ganache for a tart counterpoint.