Preheat the oven to 180'C.
Melt the chocolate over a bain marie. Beat the eggs with the sugar until light in colour. Add the flour, baking powder, yoghurt, oil and melted chocolate. Mix together.
Butter and flour the baking tin. Pour in a little of the cake batter then sprinkle in a layer of roughly chopped walnuts and almonds. Repeat until all of the batter and nuts have been used up.
Bake in the oven for 45 minutes. Halfway through the cooking process, pierce the centre of the cake with a knife and return to the oven to finish cooking.
«You can vary this recipe by using nuts of your choice. »