Several years ago, a friend from Ethiopia suggested I try butter in my coffee. He said it reduces the bitterness.
It did and is now my favorite way to drink it.
My question is, is this really Ethiopian or do other cultures use butter in coffee?
Recently the health community CrossFit etc have discovered the benefits of buttered coffee. They generally use coconut oil, but it's a similar thing. Just google "coconut oil in coffee paleo" & you'll find tons of info, some good, some ??? ;-)
I'm from Poland, and have heard of someone's grandma from a rural area drinking coffee this way. So it may not be just Ethiopian way of serving that beverage.