For the dough, put flour, milk, eggs, sugar and soft fat in a mixing bowl and mix to a smooth dough. Let the dough swell for 1 hour. Heat some oil in a pan and bake 12 wafer-thin pancakes from the dough.
Keep the crepes warm. For the sauce, wash the orange with hot water and dab dry. Grate the sugar cubes on the orange peel until they are golden yellow. Melt the sugar cubes, sugar and butter in the pan while stirring and brown lightly.
Deglaze with some orange liqueur or cognac and lemon juice and stir until the sugar is completely dissolved. Arrange the crépes in a pan (it must not be coated under any circumstances) and pour the sauce over them.
Drizzle the rest of the orange liqueur or cognac over it, light and flambé. Garnish with orange and lemon balm.