Listening to the Alton Brown podcast the other day, the biscuit episode specifically, from July of last year, and he made an interesting observation about baking powder. He pointed out that he never keeps baking powder more than half its official shelf life, since its leavening properties tend to deteriorate.
I thought I'd better check my baking powder.
Time to go shopping.
I probably won't get this on Amazon, but remember, if you are shopping on Amazon.com for anything, if you start by navigating to Amazon using the link at the top right of my blog I get a small commission and it doesn't cost you anything extra.