How to do it:

1. Preheat the oven to 160 degrees hot air (175 degrees upper and lower heating).
2. Mix together the flour, bicarbonate and salt in a bowl and set aside.
3. Stir together the butter, icing sugar, brown sugar and vanilla powder to a creamy mass.
4. Stir in the egg and finally the flour.
5. Mix in the chocolate buttons, save a little to press down on the biscuits.
6. Press the dough onto baking paper on a baking tray. It should be approx. 15 cakes.
7. Bake for 10-12 minutes until they have a nice color but are still soft. Take them out.
8. Sprink some flaked salt and let them cool on the tray.

Well received!

See video for how to do it: