Bring about 6 cups of water to boil in a large pot.
Separately make atole blanco. To do this you need a bowl. Add the flour and about two cups of water, and mix with your hands until most of the flour has completely dissolved. When the water starts boiling, put a strainer above pot and pour the flour mixture through the bowl into the pot of boiling water. Mix and boil for 5 minutes, frequently stirring.
Add the chocolate and sugar. Keep mixing until the chocolate and sugar has completely disolved. Enjoy.