Here's the recipe for making a real chocolate beverage. Important steps are in boldface.
With oil, which gives you a richer flavour:
Spread aluminum foil on a table and make small pies of chocolate, about 1/4 of an inch high, and 6 inches in diameter. Let them rest overnight. The morning after they are hard tablets. Remove them from the aluminum foil and rap them in it. Store in the freezer.
Without oil, some flavour is gone, less bitter, weaker (whimper) chocolate:
Put the paste inside a thin cloth (like linen), close the cloth and squeeze until the oil comes out. If you manage to get most of the oil out, what is left is high quality cocoa powder, like Droste's.
What is left now is either bitter tablets or bitter cocoa powder.
You can now make a nice beverage as follows:
Enjoy!