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How to test baking soda and baking powder to see if they’re expired

If your favorite baking recipes suddenly stop turning out well, don’t panic! There may be a simple answer—your leavener may be expired. (By the way, this is the difference between baking soda and ...

Simple steps to check if your old baking powder still works before you start baking

Baking powder can remain unchanged in appearance while it loses effectiveness over time due to exposure. Testing its strength is simple and requires only hot water and a teaspoon of baking powder. If ...
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Not sure if baking powder’s still good? Here’s the test

DEAR HELOISE: I understand that baking powder has a shelf life, and that it can go bad. Can you tell me how long it remains good? — Joe and Kay, via e-mail It does have a shelf life, and here’s how to ...

What Actually Happens When You Open Your Oven While Baking?

I put a common baking rule to the test by baking two yellow cakes side by side. The results surprised me.