How to make
Mix the yogurt, ammonium bicarbonate and baking soda. Sift the flour and mix it with all other ingredients to the previously well mixed ones. Knead a soft dough.
Pour it in a pastry bag and shape cookies, or just roll it out and cut out shapes. You can just make ordinary balls too.
Bake them to a nice tan in a moderate oven. The longer they sit afterwards, the softer they become.