Light and spongy chocolate cake. Made with only 4 ingredients, served with whipped cream and berries coulis.
Preheat oven to 190ºC (no fan)
Melt the chocolate and butter together in the microwave in increments of 30 secs at bain marie on the stove. Stir with a spatula every now and then, and remove from heat when you see the chocolate is almost completely melted.
Take the eggs and separate the yolks from the whites into two different bowls. Beat the whites with an electric whisker. Gradually add 1/4 of the sugar (about 30g) and whisk until soft but not stiff peaks are formed.
Beat the egg yolks until they start to foam up, add the remaining sugar and beat well, until the mixture doubles in volume. Once the chocolate mixture has cooled down, add it to the egg yolks and beat until smooth.
Take the spatula and fold in 1/4 of the egg whites into the chocolate mixture to lighten it up. Then, add the remaining egg whites, folding them in gently, scraping the sides of the bowl to fully incoporate the whites. It's OK if you still see some white or light-coloured stripes. No need to overfold, otherwise you might "deflate" the egg whites.
Pour the cake mixture into a previously buttered/oiled round springform pan (22x7cm). Bake for
15 mins at 190ºC
15 mins at 175ºC
25-30 mins at 120ºC
or until the cake starts pulling away from the sides of the pan. It's ok if the top is slightly cracked.
Let the cake cool in the pan before removing it. Dust the top with cocoa powder or confectionery sugar. Serve with a dollop of whipped cream or ice-cream, and some fresh berries or coulis.