When it comes to baking yeast-free treats like cookies ... When substituting with baking powder, use 1 teaspoon of baking powder in place of each 1/4 teaspoon of baking soda.
Stir in the sugar and leave it in a warm place for five minutes until the yeast is covered with froth. Meanwhile, mix together the flour, onion seeds, salt and baking powder. Stir in the oil ...