1. Bring unopened cheese and butter to room temperature.
2. In bowl, beat the cheese and butter together by hand until well mixed.
3. Add chopped onion and mix well.
4. Cover tightly with several layers of plastic wrap and aluminum foil.
5. Refrigerate several hours, preferably overnight for the flavors to meld.
6. No matter what you do, your refrigerator will smell in the morning.
7. Serve with saltine crackers and lots of good beer!

Cook's Comments :
It has been said that "The stench will permeate an entire hotel! Your neighbors will throw lime under your house! You will find out who your true friends are!"