1 and 1/2 cups cake flour plus extra for cake pans 3 ounces unsweetened baking chocolate (good-quality ... Add the 2 whole eggs and 8 egg yolks, vanilla, and sour cream and continue beating ...

This chocolate cake contains no butter or oil so is naturally lower in fat than a classic chocolate sponge ... whisk together the whole eggs, vanilla extract and caster sugar until pale, doubled ...