What is the difference between Dutch-process cocoa and cocoa powder?

[True2marie]

What is the difference between Dutch-process cocoa and cocoa powder?

I have seen recipes for chocolate cake call for one or the other. Yet, I don't know how they effect the end result, differently. Is one more bitter or richer in flavor?

 

[Alex H]

http://www.davidlebovitz.com/2010/02/cocoa-powder-faq-dutch-process-v/

 

[MyDigitalpoint]

From such article:

Because natural cocoa powder hasn’t had its acidity tempered, it’s generally paired with baking soda (which is alkali) in recipes. Dutch-process cocoa is frequently used in recipes with baking powder, as it doesn’t react to baking soda like natural cocoa does.

Now I understand why the other day I put natural cocoa interchangeably for dutch-process cocoa in a recipe using baking soda, and the batter became effervescent.