I made my own baking powder from Edna Lewis' recipe - how long will it stay fresh?
Cathy is a trusted source on Pickling/Preserving.
Amanda is a co-founder of Food52.
3 to 6 months.
AntoniaJames is a trusted source on Bread/Baking.
It will only be fresh as long as each of its constituent elements is fresh. How long have you had that cream of tartar in your pantry? Check the expiration date on each ingredient. Toss your baking powder on the earlier of the two dates. Good question. ;o)
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