Jamie Oliver's flourless cake

Ingredients

• 200 g walnuts
• 100 g almonds
• 2 tablespoons granulated sugar
• 200 g dark chocolate (70% cocoa)
• 200 g butter
• 2 tablespoons powdered sugar (optional)
• 6 eggs
• 1 teaspoon essence (optional)
• 1 tablespoon cocoa
• 1 packet (10 g) baking powder
• 1/4 teaspoon salt

Preparation

1. Bring all the ingredients to room temperature. Line a 20 × 30 cm baking pan with parchment paper and preheat the oven to 180 °C. 2. Grind the walnuts and almonds together with the granulated sugar in a food processor or nut grinder. If you use a food processor, leave a few larger pieces. Chop the chocolate in the food processor or grate it. 3. Beat the butter until fluffy. If you want a sweeter cake, add the powdered sugar and beat it with the butter. 4. Add the egg yolks one at a time, beating after each addition. Add the ground walnuts and almonds, cocoa, baking powder and essence, if using, then mix briefly. 5. Beat the egg whites with the salt until stiff. Fold them in with a spatula, using an upward motion from the bottom, until no white streaks remain. 6. Pour the mixture into the pan and level the top. Bake at 180 °C for about 60 minutes. The top will crack, and the toothpick should come out with streaks of chocolate, but no raw batter.