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For a good long time if it is kept properly stored. Here is a test you can use to make sure your baking powder is usable .
Put water in a teaspoon and sprinkle a little bit of the baking powder in the water. If your baking powder is good the water will fizz sort of like a soda does. if you don't hear or see the fizz then baking powder is no good and should be tossed out.
What else can I help you with?
How long does food stay fresh in fridge if power goes off?
It will stay fresh for some hours. Not too long. So it depends how long the fridge been off. Too long is bad.
How long does frosting stay fresh?
it can stay fresh for 2 weeks
How long do cookies stay on a computer?
as long as they are baking.
How long honey stay fresh?
Forever
How long does cod stay fresh when chilled?
cod will stay fresh forever if you freeze it in a air tight bag.
What does baking soda salt and flour do to an apple to rot?
salt wil make it stay fresh for a while :D
How long brownies stay fresh?
i would say brownies stay fresh for about 3-5 days if they are in a sealed container.
How long does weed stay fresh?
Weed stays fresh for a long time. You can put it in a plastic bag to keep it fresh for a long time or you can also freeze it.
How long does pie stay fresh?
two days
How long will flower stay fresh in the refrigerator?
i don't think it will help the lifespan of the flowers
How long does couscous stay fresh?
up to the use-by date
How long does pecaN pie stay fresh?
two days
