In a bowl, mix the butter with the icing sugar. Add the egg, mix well, then add the flour, cocoa, ground almonds and fleur de sel, mix to form a ball. Roll it out on a baking sheet lined with parchment paper to a thickness of 1 cm and place in the refrigerator for 1 hour.
With cookie cutters, cut shortbread cookies, reserve the outlines. Form a small hole at the top of each shortbread with a small straw. Slide the plate in the fridge for another 1 hour.
Preheat the oven to 350 degrees. Bake the shortbread cookies for 8 to 10 minutes, watching closely, they should brown without colouring too much. Take them out of the oven and let them cool on a wire rack.
For the glaze: melt the chocolate in a double boiler over low heat. Heat the fondant in a saucepan over low heat or in the microwave with 1 tbsp. water. Whisk to smooth the icing, it should be fluid but covering. Off the heat, pour in the melted chocolate and stir to smooth. Pour into a cone with the end cut off and draw patterns on the biscuits according to your inspiration.
Crush the cocoa beans and sprinkle the parts of the shortbread that have a thick layer of icing to stick them. Leave to dry before threading the shortbread cookies delicately on a ribbon or pretty string to make a garland.