Beat the eggs with sugar, until they’re mounted. Add the yogurt and the melted butter. Beat all this ingredients adding the flour, the baking and milk.
Grease and flour your plum cake mould (I used the mini ones, lovely!).
Turn your batter into the stamp and sprinkle a bit of chocolate on your mixture.
Bake in the preheated (180 degrees C) oven for 40 minutes, or until a tooth pick inserted into the center of the cake comes out clean.