Melt the butter. Mix flour, sugar, salt and cocoa. Stir in butter and milk. Add 2 eggs and mix to a smooth dough. Pass the dough through a sieve and let it swell covered for about 1 hour.
Meanwhile, chop the chocolate roughly and melt it over a hot water bath. Remove the bowl from the bain-marie and let it cool off lukewarm. Separate 1 egg. Beat the egg white and 100 g cream separately with the whisks of the hand mixer until stiff.
Stir egg yolk and 50 g cream into the chocolate. Fold in the cream first and then the beaten egg white. Cover the mousse and chill for about 30 minutes. Roast the almonds in a pan without fat until golden brown. Let it cool down on a flat plate.
Heat oil in portions in a coated pan (approx. 19 cm Ø). Bake 8 crêpes from the dough. Let them cool down for about 30 minutes. Wash the orange hot, rub dry. Peel off the skin in thin strips with a chiseler.
Blanch strips in boiling water for approx. 30 seconds. Pour off, rinse with cold water and let it drip off on kitchen paper.
Place the crêpes next to each other on the work surface. Put a blob of chocolate mousse and a few flaked almonds on each crêpe. Fold the crêpes over the mousse into a packet and tie with orange strips.
Arrange on a plate and sprinkle with the remaining almond flakes. Serve with vanilla sauce.