Prepare the required ingredients in the quantities specified in the recipe. Peel and chop the nuts, peel the banana, and be sure to sift the flour to obtain an airy dough.
Start preparing the dough; to do this, combine eggs, sugar, sour cream and soda in a deep container and mix the ingredients thoroughly. Then slowly stir in the previously sifted flour and knead the dough until it becomes elastic and moves away from the walls of the dish. Roll the dough into a sausage and divide into 6 equal parts, each of which roll into a ball.
Start forming the cake layers; to do this, take a ball of dough and roll it into a thin round layer. Take a plate, place it on top of the rolled out dough and trim off the uneven edges in a circle. Follow similar steps with remaining dough. Fry each cake in a frying pan for 2-3 minutes on each side until lightly browned.
While the cakes are cooling, start making the cream and filling for the cake. Place peeled nuts and sliced bananas in a heated frying pan and fry the ingredients until golden brown. For the cream, beat sour cream with sugar until smooth, add vanillin to the resulting mass and mix.
Start forming the cake; to do this, place the cake on a plate, brush with carefully prepared cream, place the nut-banana filling on top and cover with the cake. Follow similar steps until you run out of cakes, coat the top layer well with cream and decorate with nuts.
Cut homemade sour cream with a banana-nut layer into portions and serve with freshly brewed tea or coffee.