Beat eggs with sugar until the mass becomes light.
Melt milk chocolate and 50 grams of bitter in a water bath with butter. Cool slightly and pour into eggs. Whisk lightly. Then add flour, soda and chopped hazelnuts. Mix everything well.
Chop the bitter and white chocolate into pieces.
Cover the sheet with parchment and lay the dough with a spoon at a good distance from each other. Then lay out the pieces of chocolate.
Bake cookies Three chocolates 12 minutes at 180 degrees. Allow the liver to cool and then only remove it from the paper because it can break.