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How long are baking soda and baking powder good to use after opening?

Question: How long are baking soda and baking powder good to use after opening?

Answer: For baking soda and baking powder to be effective in your baking, they should not be more than one year old.


2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?