Baking powder sold in stores and used in many sweets can be easily prepared at home.
Take to a dry jar.
Pour 12 teaspoons of flour or potato starch into the jar (more starch remains).
Add 5 teaspoons of baking soda and 3 teaspoons of lemon salt. Crush the lemon salt well in advance.
Close the lid of the jar and shake the jar well so that all the ingredients are well mixed. The baking powder is ready.
Pour the prepared baking powder into a small glass jar and store in a cool dry place.