Whisk the eggs with the icing sugar. After a cream is formed, add the yogurt and keep whisking

Add the flour, the yeast and the vanilla. Once everything is mixed, add the melted butter

Keep mixing until a uniform mix is made. Pour half of it in a baking tin, drop 4 spoons of nutella in different spots.

Cover with the remaining mix and cook at 165 C for 35 min. Let it cool before serving