Maybe you already knew that both baking soda and baking powder are used as "levelers" in baked goods which help the dough rise and create a fluffy-ish texture. This is caused by a chemical reaction achieved when moisture is added to the baking powder releasing carbon dioxide, which gets trapped inside tiny air pockets in the dough. (Think sponge cake)
But did you know that you could MAKE baking powder? YUP! And here's another little secret: its made out of baking soda!
Whoa, sit back down. I know its shocking, but just click on, and you'll see the lies unfurl. Baking powder, you have some explaining to do!
Step 1: The Ingredients
1 part Baking Soda
2 parts Cream of Tartar
(optional) 1 part Corn Starch
Mix it all together in a lie of webs or bowl, if you prefer. Shake it up to make sure it all gets mixed
Step 2: Bake some cookies
Step 3: Storage
You'll add weeks to the life of your baking powder if you store it, tightly covered, in a cool place. Some experts say its best to store it in the fridge, whereas others say dry pantry is the best bet.