Line baking trays with baking paper. Beat egg white and salt until stiff. Gradually add icing sugar and vanilla sugar while continuing to beat
...to leave. Remove approx. 1/4 of the meringue and set aside
Fold the espresso powder, ground almonds and flour into the rest of the meringue. Form walnut-sized balls with 2 teaspoons and place them on the trays
With 1 teaspoon on each ball a small stain of the remaining meringue. Place 1 almond on top. Leave to dry at room temperature for about 2 hours. Bake in a hot oven (electric cooker: 150 °C/ convection oven: 125 °C/gas: level 1) for about 25 minutes. Let them cool down