cm cake tin & pour in mixture. 6) Bake in slow oven (150 deg, C) for approx 2,5 hours. 7) Stand for 5 minutes before turning out of tin. Icing: 8) Melt chocolate and butter in double boiler and beat with a wooden spoon until smooth. 9) Pour over cold cake and smooth out. Note Cooking time may vary. Cake is cooked when skewer comes out reasonably clean.