Do you need baking soda and baking powder in same recipe?

Sorry but if the recipe calls for it you need both

Baking powder is composed of:

baking soda + two dry acids

When exposed to heat it will react ONLY with itself to create gas to help the baked product rise.

Baking soda is just baking soda:

It reacts with an acid ingredient in your recipe when exposed to moisture which produces gas. Without the acidic ingredient the baked product will taste soapy or bitter, and without the baking soda your baked product will taste sour.

Acid Ingredients include (but are not limited to):

buttermilk

vanilla

lemon juice