C.N.
I just bake with it. I wouldn't worry about it being expired. It's one of those things I never even check the date on and I've never had any bad results.
I found two cans of expired baking powder in my cupboard. They aren't expired by too far, and still fizz when I put it in water.
I don't want to use it for cooking, but I was wondering if ere are any other uses... Child-appropriate science play... Health/beauty uses.... Anything! I did have a little fun letting my 3yo drop chunks in water and watch it fizz... But it really wasn't a strong enough reaction to keep her interested for long. Lol.
Sooo... Anyone have any ideas?
Remember... Baking POWDER, not soda. ;)
I just bake with it. I wouldn't worry about it being expired. It's one of those things I never even check the date on and I've never had any bad results.
Go get a large bottle of vinegar and let the volcano eruptions begin! (SO much better than water!)
It's also good for a mild abrasive for scrubbing out sinks, tubs, shower stalls...
Didn't know it ever expired! Lol
ETA: baking powder and baking soda DO expire - when baking powder expires, it will no longer bubble when expired...baking soda - won't fizzle when acid is introduced...so since it still fizzled - you can use it for baking still.
_____________
You can still use it to put out an fire on the stove.
You can still use it with lemon juice to clean your drain.
You can still use it with water to make a "patch" for a bee or wasp sting (more like thick mud).
What can't you use baking soda for?
It's great for brushing teeth with (even if it doesn't fizz anymore, for cleaning all you need is the fine grittiness anyway).
You can leave an open box in your freezer and/or fridge.
You can use it with salt to make your own saline solution for your neti pot.
And more!
baking powder is generally just baking soda mixed with an acid, so you can probably still use it as you would with baking soda (cleaning sinks, toilets, tubs, or any other surface). You may be able to use it to whiten your teeth (I dip my toothbrush in baking soda and brush them 1-2 times a month and it does work quite well although the taste leaves something to be desired). I also use baking soda mixed with fresh lemon or orange juice as a face mask once or twice a month and it helps exfoliate and zap blackheads, so I would bet you could try baking powder for that as well.
http://voices.yahoo.com/smart-living-four-non-obvious-use...
Also, I've been told that if you put a teaspoon or so into a cup of water and it becomes "lively", it's still good.