2sticksunsalted buttersoftened at room temperature (1 cup)
1 1/4cupsgranulated sugar
6largeeggsseparated and at room temperature
7ouncesbittersweet chocolatefinely chopped
1cupalmond flour
1/2cupcocoa powder
1tspvanilla extract
1/4tspsalt
For Serving
powdered sugarfor dusting
Instructions
Preheat your oven to 325°F (165°C). Generously grease a 9-inch round springform pan with butter and line the bottom with a circle of parchment paper.
Place the softened butter and granulated sugar in a large mixing bowl. Using an electric hand mixer or a stand mixer fitted with the paddle attachment, cream them together on medium-high speed for 3-4 minutes until the mixture is light, pale, and fluffy.
Beat the 6 egg yolks into the butter-sugar mixture one at a time, ensuring each yolk is fully incorporated before adding the next. Mix in the vanilla extract. In a separate, clean, dry bowl, use the electric mixer to beat the 6 egg whites with the salt on high speed until they form stiff, glossy peaks.
Melt the finely chopped bittersweet chocolate in a heatproof bowl set over a pot of gently simmering water, stirring until smooth. Remove from heat and let it cool slightly. Stir the melted chocolate into the butter and egg yolk mixture until just combined.
Gently fold the almond flour and cocoa powder into the chocolate batter using a spatula until no dry streaks remain. Then, carefully fold in the whipped egg whites in three separate additions, using a light lifting motion to keep the batter airy.
Pour the batter into the prepared springform pan and spread it into an even layer. Bake for 45-50 minutes, or until the top is set and a toothpick inserted into the center comes out with a few moist crumbs attached.
Let the cake cool completely in the pan on a wire rack. The center will sink slightly as it cools, which is normal. Once cool, run a knife around the edge, release the springform pan clasp, and transfer the cake to a serving plate.
Dust the top of the cooled cake generously with powdered sugar just before serving.
Notes
The center will sink slightly as it cools, which is normal.