Q: Whenever I use baking soda, my eyes always fall guiltily on the packaging, which tells me that I should buy a new box every month. As much as I bake, there's no way I could go through an entire box of baking soda in a month, so it seems wasteful to follow their instructions unless there's a real reason.
Editor: Emilie, there is no need to replace your baking soda or baking powder every month; that recommendation applies to baking soda you are using to absorb odors. The shelf life for baking soda is about three years, but if you are worried that an open box is no longer potent, you can do a quick test to check it:
Readers, how often do you replace your baking soda and baking powder?
(Image: Elizabeth Passarella)