I do think it's a very simple procedure but have found a cowboy coffee recipe of a person who like to backpack and seems to know the difference:
Bring one quart of water to a boil in a saucepan.
Add 3/4 cup of ground coffee.
Return to boil.
Immediately remove from heat and cover.
Wait till the grounds sink (approximately 5 minutes).
Serve.
But I think cowboy coffee seems so tasty mostly because it is prepared outdoors, in a primitive vessel from no matter what grounds - let them only be fresh and tasty. That's the true recipe