A classic American
1 can of rootbeer
1 big scoop of vanilla ice cream
Find a Coca-cola glass (one of those glasses that are narrow at the bottom that widen out in a round curve at the top). Fill two thirds of the glass with the rootbeer. Add the scoop of ice cream. Tah-dah!
There is a great debate over whether one should add the rootbeer or the ice cream to the glass first. I for one happen to be firmly planted in the rootbeer-first camp, as you get much more of that wonderful milky foam that way.
Quite simple, isn't it? The best things in life usually are.