Prepare everything you need.
Break eggs into a bowl, add sugar.
2 pcs egg, 80 g sugar
Mix with a whisk, add sour cream.
60 g sour cream
Sift half of the flour and cocoa powder into the dough, add baking powder.
90 g cocoa powder, 90 g flour, 1 tsp baking powder
Mix until smooth, pour in milk.
120 ml milk
Add the remaining dry ingredients, cocoa, salt, and flour.
2 tbsp vegetable oil, 1 pinch salt
Mix, add vegetable oil.
The dough will be not very thick, homogeneous, rich brown color.
Grease a pan, here 24 centimeters in diameter, with vegetable oil, heat it up and pour the dough. It should spread out and distribute itself in an even layer on its own.
Cover with a lid, set the heat to the very minimum, and cook without opening the pan for 20 minutes. Pierce with a toothpick, it should come out dry.
The chocolate cake in a pan is ready. It is soft, porous, and moist. Decorate as desired. For example, sprinkle with chocolate shavings, here from white chocolate.