Share on ThriftyFunThis page contains the following solutions. Have something to add? Please share your solution!
Don't keep baking powder for more than one year, as it loses its potency. To check whether your baking powder is still usable, add 1 teaspoon of it to 1/3 cup of hot tap water. The mixture should bubble vigorously.
By Joesgirl
Arm and Hammer places the shelf life of their baking soda at 3 years. As a leavening agent, it might not be a good idea to use baking soda older than this. However, as a cleaning agent, I would not have any reservations about using baking soda that had been on the shelf for 50+ years.
This was about powder, not soda. Very, very different.
It took me a year and a half to discover this. And you are right.
