Mocha Truffle Cake

Mocha truffle cake is essentially a giant baked dark chocolate truffle. There is no flour in the recipe. The structure comes entirely from a pound of semi-sweet chocolate, a pound of unsalted butter, two cups of sugar, and eight whole eggs whipped thick. The pound of coffee swept through it deepens the chocolate flavor without making the cake read as a coffee cake.

The technique is closer to a custard than a traditional cake. Chocolate, butter, sugar, and coffee melt together gently until the sugar fully dissolves, then beaten eggs fold in to enrich the batter. Bake until the center is just set, then refrigerate overnight in the pan; this is what gives the cake its truffle-dense texture.

The whipped cream frosting is deliberately light to balance the dark intensity of the cake. Sweetened only with a quarter cup of powdered sugar and a touch of vanilla, it provides contrast against each rich bite. Chocolate flakes scraped from a marble slab of hardened melted chocolate finish the presentation.

Pro Tips

• Line the pan with foil all the way up and over the sides; the cake is too dense to release any other way.
• Use the highest-quality chocolate you can afford; with only a few ingredients, the chocolate makes or breaks the cake.
• Bring the eggs to true room temperature before beating; cold eggs will firm up the warm chocolate mixture and create lumps.
• A small slice goes a long way; this is a 2-inch wedge dessert, not a generous portion.

Variations

• Swap regular coffee for espresso for a more intense mocha profile.
• Add 2 tablespoons of Kahlua or Grand Marnier to the chocolate mixture for a flavored liqueur version.
• Top with fresh raspberries and a dusting of cocoa powder instead of the chocolate flakes for a fruit-forward presentation.