Baking powder replacement?

Question

I want to make this recipe: http://www.joyofbaking.com/biscotti/CranberryPistachioBiscotti.html

But I went to three different places (not my supermarket, its too far to walk in DC heat), and i couldnt find baking powder, and nor do I have baking soda to mix with the cream of tartar I have. Is there anything else I can use? What happens to the dough if I completely leave it out?

Answer 1

Both baking soda and baking powder are leavening agents, which means they are added to baked goods before cooking to produce carbon dioxide and cause them to 'rise'. Baking powder contains baking soda, but the two substances are used under different conditions.

BAKING POWDER – There are three ways you can substitute for baking powder, depending on the recipe:

1 teaspoon baking powder equals 1/4 teaspoon baking soda plus 1/2 teaspoon cream of tartar; or, 1 teaspoon baking powder equals 1/2 teaspoon baking soda plus 1/2 cup buttermilk or plain yogurt: and 1 teaspoon baking powder also equals 1/4 teaspoon baking soda plus 1/3 cup molasses. When using the substitutions that include liquid, reduce other liquid in recipe accordingly.

EDIT

Sorry about that.  I must have overlooked that important detail.  Well, I looked all over the internet in search of other options for you but I am sorry - I couldn't find one.  Baking powder and baking soda are of the utmost inportance, so I wouldn't recommend omitting them.  Sorry I couldn't help you any more.