Put all ingredients in a blender and blend them all together very well until combined.
Grease a ring cake pan with butter and pour the batter in it.
Place this cake pan over a larger baking tin and pour some hot water in it to bake in a double boiler.
Bake in a preheated oven at 200°C (392°F) for 1 hour and a half or until firm.
Top with chocolate sprinkles, to taste.