Here's the stuff that we know about Baking Powder...
A raising agent used in baking that combines mild acid (usually cream of tartar) with mild alkali (such as bicarbonate of soda). When mixed with liquid the powder generates carbon-dioxide forming bubbles that cause a mixture to expand.
How do I get Baking Powder ready to use?
Make it yourself by combining half a teaspoon of tartar and quarter of a teaspoon of bicarbonate of soda. This will make the equivalent of 1 teaspoon of baking powder.
A raising agent used in baking that combines mild acid (usually cream of tartar) with mild alkali (such as bicarbonate of soda). When mixed with liquid the powder generates carbon-dioxide forming bubbles that cause a mixture to expand. 