hi
baking powder helps the cupcakes to rise
cupcakes CUPCAKES CUPCAKES!
the bottom of the oven.
chemical
One can find online recipes for baking cupcakes from webpages that specialize in cooking (specifically baking) which will give you clear instructions as to how to cook delicious cupcakes.
You can try baking soda, but reduce any additional salt.
you do it with both
A chemical change
Amala, who is baking cupcakes that will be sold at a local bakery.
Baking powder is a "leavening agent" that makes cakes rise. Baking soda and cream of tartar together do the same job -- they react to make carbon dioxide gas. If you try to make cupcakes without either baking soda, or the combination of baking soda and cream of tartar, your cupcakes will not rise and you will get something close to cookies. Corn starch is a thickener and acts similarly to flour. If you have flour, corn starch may not be necessary.
Mealted Chocolate
Use self-rising flour instead of all-purpose flour, and you can leave out the baking soda, baking powder, and salt.