How to make
Beat the eggs with sugar with a mixer. Add the milk, flour, oil, vanilla, baking powder.
Stir everything very well. Divide the mixture into 2, add the cocoa to 1 part.
In the middle of a tray that you've oiled and sprinkled with flour, pour in 2 tbsp of the white mixture, then 2 tbsp of the brown mixture on top.
Continue alternating between the 2 until you've run out. Bake the cake in a preheated 360°F (180 °C) to a dry toothpick. It's extremely delicious, perfect to have with coffee!