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If you started kneading the dough and found at the end that the packaging from under the baking powder is empty on the shelf, do not rush to throw away what you started. You can replace the purchased component, which is mandatory for almost all baking, with simple products that you probably have in excess.
Soda
The simplest method, which was used even 50 years ago, is ordinary drinking soda.
It can be added to dough based on fermented milk products (kefir, sour cream, or yogurt).
Soda quenched with vinegar
This option is suitable for any type of dough.
Add a little vinegar to the baking powder, which should be kept in a spoon over the dough, and mix well before sending to the other ingredients.
Sparkling water
On the basis of carbonated water, a wonderful buttery dough can be obtained. By the way, you can enhance the effect of a carbonated drink by adding a pinch of salt with citric acid to it.