These dark, fudgy cakes are sinfully rich and totally irresistible, with a dense base and a soufflé-like top that rises beautifully with the help of a paper collar. Sheer indulgence!
Preheat the oven to warm 170°C (325°F/Gas 3). Lightly grease six baking rings, each 7-8 cm (3 inches) across and 2 cm (¾ inch) tall. (You can use 12 egg rings instead, stacking them two-high to form six ‘rings’.) Line a baking tray with baking paper, grease the