Usually cookies need baking soda, not baking powder. If they call for both, it’s at least 2x baking soda. People mix it up and add baking powder instead of soda.
Or if the cookie requires levening from the powder and it’s expired, it will not rise and spread.
Soda helps with browning and powder is for levening
This is right about the mix-up, etc. But, they are both levening agents. Powder includes an acidic reactor, and soda requires one to be included separately. Using both is a way to fine tune the reaction.
What is wrong with the baking powder? Too much? Too little? Too expired?
Usually cookies need baking soda, not baking powder. If they call for both, it’s at least 2x baking soda. People mix it up and add baking powder instead of soda.
Or if the cookie requires levening from the powder and it’s expired, it will not rise and spread.
Soda helps with browning and powder is for levening
This is right about the mix-up, etc. But, they are both levening agents. Powder includes an acidic reactor, and soda requires one to be included separately. Using both is a way to fine tune the reaction.