Ingredients: 190 g butter 75g icing sugar, 1 egg white 200 g flour, 1 tablespoon cocoa powder, 1 pinch of salt Spread or jam, instructions In a bowl, work with a wooden spoon the butter then add the icing sugar and salt. Stir the egg white and then the sifted flour with the cocoa powder. Mix until a smooth and homogeneous paste. Using a pocket fluted tip , forming rosettes on a sheet of parchment paper placed on a baking sheet . Bake 15 minutes in an oven preheated to 180 ° C (350 F). Cool.