At a glance
This indulgent chocolate cake comes together through a few key stages: whipping eggs and sugar into a fluffy cocoa sponge, layering it with chocolate-mascarpone cream and jam, then topping it with a glossy chocolate glaze. The trickiest part is getting the sponge layers right—you'll need to let it cool completely before slicing, and avoid opening the oven door for the first 30 minutes so it doesn't sink. With about 3 hours total, you're creating something seriously impressive for that special someone.
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Start by weighing your ingredients
Weigh the eggs in their shells (using the exact number of eggs you plan to use) — you'll need the same weight of granulated sugar and the same weight of plain flour. Careful! For this cocoa sponge, subtract 50 g from the flour weight and replace those 50 g of flour with good-quality cocoa powder instead.
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Whipped egg yolk foam
Allow 2 tablespoons of hot water per egg. Whisk the egg yolks together with the sugar and water. Once the foam has thickened and the sugar has dissolved, whip the egg whites into stiff peaks and fold them into the yolk foam alternately with the flour.
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Prepare the tin
Pour the sponge batter into a 26 cm cake tin lined with baking paper. Don't press the paper down into the tin. Cut a circle to fit the base exactly, plus strips to line the sides of the tin.
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