Sift the flour and cocoa powder, mix, and mix to make a mass, and then thin and rest in the refrigerator.
Put the chocolate dough on the vanilla dough, cut the edges, cut it in half, roll it, shape it into a rectangle, and harden it for about an hour in the freezer.
On the Nutella dough, put a piece of dough on top of it, attach the Nutella dough to one side, symmetrically attach the other dough to that side, and wrap it with Nutella dough.
Wrapped in a wrap, hardened for 30 minutes in a freezer, chopped and placed in an oven pan. Bake and cool for 14-15 minutes in an oven preheated to 160 degrees.