Ingredients
Method
- Mix cocoa with boiling water to a smooth paste. Cool 5 minutes.
- Preheat oven to 180°C / 160°C fan / Gas 4. Grease and line two 20cm tins.
- Place butter, sugar, eggs, flour, baking powder, milk, vanilla, and cooled cocoa paste in a large bowl. Beat 2–3 minutes until smooth. Divide equally between tins — weigh for even layers. Bake 22–26 minutes until a skewer comes out clean. Cool completely.
- Melt dark chocolate over barely simmering water. Cool to room temperature — fluid but not warm.
- Whip cold cream, icing sugar, and vanilla to soft peaks. Pour cooled chocolate over cream. Fold gently until uniformly dark. Refrigerate 15 minutes if too soft.
- Place one sponge on plate. Spread jam if using. Spread chocolate cream generously. Top with second sponge. Dust with icing sugar and cocoa.
Notes
Bloom cocoa in boiling water — the most important step for deep chocolate flavour.
Cool melted chocolate completely before adding to whipped cream — warm chocolate melts it.
Fold chocolate into cream gently — overmixing deflates the cream.
A jam layer between sponge and cream is optional but highly recommended.
Refrigerate filled cake if not serving within 1 hour.
Unfilled sponge layers freeze for up to 3 months.
