Mix the cooked skin with the chicken stock, the tapioca powder and the salt. Blend it till smooth and thickened. The friction will create heat which will cook the tapioca. This takes a couple of minutes.
Now pour it in a bowl and add the baking soda. Mix it well and then transfer it into a piping bag. Let it cool down in your fridge.
Once cold you can spread it or pipe small dots on a silicon sheet.
Place another sheet on top and bake them at 180 °C for 12 to 15 minutes. Then let them cool down and keep them dry and covered for later.
