2 hr 30 min — Medium — American
Condensed milk and soured cream go into this batter alongside sunflower oil and butter — two sources of fat that keep the crumb soft and the layers from drying out over days. Boiling water stirs through at the end, blooming the 100g of cocoa powder for a darker, more pronounced chocolate flavor throughout. The frosting repeats the condensed milk with butter, icing sugar, sifted cocoa, and chopped dark chocolate, spread between two 20cm rounds. Serves 10; the full process takes about 150 minutes, including cooling time.