Cocoa powder can be used on its own to flavor cakes, pies, brownies and cookies. Three tablespoons of cocoa plus 1 tablespoon butter, shortening or oil can be substituted for one square of unsweetened Baking Chocolate in almost any recipe.
Baking soda is required to leaven the baked product. Either baking soda or baking powder would need to be included in the batter regardless of the use of cocoa powder.
No.
Baking powder accelerates electrons and cocoa powder slows them
Mealted Chocolate
You can buy cocoa powder at your local grocery store in te baking section.
Not generally -- because there is unsweetened (baking chocolate). The best thing to substitute is cocoa powder and butter/oil/shortening. For each ounce of baking chocolate substitute 3 tablespoons of cocoa powder and 1 tablespoon of butter (or oil/shortening).
Usually yes. Some recipes specify "baking" cocoa powder just so that nobody gets confused and uses "drinking chocolate mix" instead (since this contains sugar and milk powder which would throw off the recipe).
The taste of baking power is a bitter taste not that far from vinegar. Baking powder is an acid, so its sour. I wouldn't recommend tasting it.
Not really. Nescafe is ground coffee powder, not cocoa powder.
It takes several, but my favorite is hot chocolate!
You cannot use baking powder as a substitute for baking soda
It depends on the recipe for the exact amount. Most will be flour. Then sugar, butter, eggs, and cocoa powder. Then small amounts of salt, baking soda / baking powder, vanilla extract, ect.