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 Posted By: phoenyxstarr 
Sep 3  # 1 of 13
I have some baking powder in my cabinet. My mom uses alot of cornstarch so she buys it at Sam's Club, but one day she grabbed the wrong jug & got the big thing of baking powder instead. Well she doesn't use it that much, so we split it. I've had it for just over 10 months now... Well I went to make biscuits the other night because I was craving them but they didn't fluff up like they should have. They looked almost exactly like the blobs of dough I put on the cookie sheet. I have a tendency to over knead my dough so I make drop biscuits, hence the blob-like look.

Well now that you know the back story, here's my question... Is there a way to test the baking powder to see if it's still good without having to bake something? I know my grandma used to add some baking soda to water to see if it was still good, would that work for baking powder too?
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 Posted By: phoenyxstarr 
Sep 3  # 2 of 13
I made some brownies with the baking powder and they puffed up like they should have... they almost made it to the top of the pan, and the batter barely hit the halfway mark. They're a little dry though, I accidentally baked them a little too long because I was busy chasing down and fighting with my daughter about wiping her nose and changing her diaper.
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 Posted By: muslgrl 
Sep 4  # 3 of 13
i have never heard if anyway to test bakiing powder
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 Posted By: TexasRose 
Sep 4  # 4 of 13
I don't know how you can test it, but baking powder does lose its potency after a time. The only way to really test it is to use it. I would guess you may be out of luck.
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 Posted By: Mama Mangia 
Sep 4  # 5 of 13
Place baking powder in warm water and stir - if it fizzes it is still good - if it doesn't fizz - toss it - it's useless.