1 tsp vinegar
1 can kidney beans
2 eggs
65g cocoa powder
100g sugar
1/2 tsp oil
1 tblsp milk
1/2 tsp baking powder
1/2 tsp baking soda
(extra - some cooking chocolate... smash into very small pieces and add to the mix just before it goes in the oven)
whizz ingredients in some sort of food processor
20mins in 180C oven