Prepare the sponge cake: separate the whites from the yolks. Protein whisk on the lowest speed of the mixer, continuing to whisk gradually add the sugar and the egg yolks, remove the mixer. Stirring the dough with a fork, gradually sift the flour and cocoa. Form grease with oil, pour the dough, bake in the oven for 25 minutes at a temperature of 190-200 degrees. Ready sponge cake cut into 2 Korzh. One subject, a second break to pieces.

Pour the yogurt in a bowl, add the sugar, vanilla sugar and beat with a mixer for about 5 minutes.

Gelatin fill with water and leave for 30 minutes. Then put on the heat, continuously stir until completely dissolved (it is important to not bring to boil). Remove from heat, still stirring pour it into the yogurt.

Mix well.

2 bananas cut into rings of 1 cm, the third banana is more subtle. Half chocolate RUB on a large grater, the other half cut into thin strips.

A deep bowl covered with cling film. Put bananas and strips of chocolate.

Pour some yoghurt, spread the slices of sponge cake, sprinkle with chocolate chips. Then again put the bananas, yogurt, slices of cake, chocolate and pour the remaining yogurt.

Cover with biscuit crust and refrigerate for 2 hours.