- Mix the flour, the sugar, salt, the butter (cut into small pieces) by squeezing and rubbing the palms of the hands together to make "sand"

- Add the egg quickly to this sandy mixture

- Put in a ball. Crush the dough with the palm of your hand several times to blend the whole thing

- Cover with a little bit flour and let stand in a cool place about 30 minutes, covered with a wet cloth

- Preheat the oven to 200 °C

- Spread the dough with a roll of 1/2 cm thick

- Cut out the dough with a cookie cutter

- Put the shortbread on an oven tray (with baking paper)

- Bake about 10 minutes in the oven,

- Melt the chocolate in a bain-marie

- Brush the biscuits with chocolate and sprinkle immediately