Description

Chocolate sponge is a type of chocolate cake. A traditional sponge cake has just three ingredients: flour, sugar, and eggs. To make chocolate sponge cake at home, preheat oven to 400°c and line the bottom of the baking tray with parchment paper. Dust with cocoa powder. Now, sift flour and remaining 1/4 cup cocoa powder through a fine-mesh sieve into a small bowl. Repeat sifting 2 more times and set flour mixture aside to rest. Crack 2 eggs into a large deep bowl. Separate remaining 2 eggs, adding yolks to bowl with whole eggs and placing whites in a medium deep bowl. Set whites aside and beat until it becomes foamy. Continue to beat until soft peaks form, about 1 minute. Sprinkle remaining 5 tsp. sugar over and beat until meringue is thick and glossy. Using a rubber spatula, fold half of meringue into egg mixture. Sift half of dry ingredients over batter and fold until just blended. Repeat with remaining meringue and dry ingredients. Scrape batter into prepared pan, spreading evenly to edges. Bake until cake springs back when pressed gently with your fingertips. Let cake cool in pan on a wire rack. Run a knife around sides of pan to release cake.