Ingredients:

• 3 eggs
• 1/2 cup sugar
• 2/3 cup sour cream
• 2/3 cup condensed milk
• 120 g butter
• 1/2 teaspoon baking powder
• 2 cups of flour
• 1 heaped teaspoon cocoa
• 1 bar of dark chocolate
  Preparation:
  Thoroughly mash the eggs with sugar. Then add sour cream and condensed milk to them. Melt the butter and add to the mixture. Gradually add sifted flour and baking powder.
  Divide the dough into 2 parts. We melt the chocolate in a water bath or simply over low heat (in this case, the container with chocolate should be greased with a little butter). Add cocoa and melted chocolate to one part of the dough.
  Take a mold, grease it with butter and sprinkle a little semolina. Pour one tablespoon of light dough, one dark, one light, one dark into the middle of the mold. And so on until the dough runs out. Place the pan in the oven, preheated to 180 degrees, and bake for 45 minutes.
  Leave the cake in the pan for 10 minutes and then place it on a plate.