Eggs and sugar is broken down until melted sugar. Yogurt is warmed slightly and add soda. When it is boiling is poured into the mixture of eggs and sugar. Add vanilla, baking powder and the oil. All this is added by stirring stops. Finally flour is added and the. Spread cake pan with sunflower oil and sprinkle with flour. After dusting flour is preferable to turn the form back so will fall flour, which is excessive. Before you pour the mixture into the separated 1 cup in which the chocolate is added. This colored mixture was poured finally being distributed roughly uniformly over the entire colored mixture. Raw nuts sprinkled on top just before baking. Bake at 180 C in a preheated oven.