Turn the oven on to 180°C in static mode and, while it reaches temperature, prepare the cake dough: finely chop the almonds to turn them into a sort of raw flour.
Pour them into a bowl and add: wholemeal flour, cocoa, sugar, baking powder, salt and grated orange zest. Mix with a fork.
Now pour the melted butter and the milk into the bowl: work the dough for 1 minute with an electric whisk to mix everything well and avoid lumps.
Pour the mixture into a buttered and floured 18 cm springform pan, level it and bake for 40 minutes. Test with a toothpick, take out of the oven and leave to cool. Remove the cake from the mold and let it cool completely on a cake rack.
In the meantime, prepare the filling: whip the cream, then add the Nutella, working it gently with a spatula with movements from bottom to top. Place in the fridge covering with film.
Prepare the icing too: chop the chocolate and place it on a plate together with milk and honey and melt in the microwave at 800 w for 1 minute. Mix to combine and getting a smooth and shiny cream. Cover with film and let cool completely.
Fill and decorate: when the cake is cold, cut it into two discs of equal height and spread the lower one with the Nutella mousse.
Cover with the top disc and go over the edges with a spatula.
Spread the chocolate icing on the surface of the cake using a spoon. (See notes at the bottom of the recipe).
Finally, decorate your Mona de Pascua with chocolate flakes, eggs of different sizes and flavors and, inevitably in perfect Spanish style, lots of colored feathers!
Your chocolate Mona de Pascua is ready to be enjoyed!