It's sooo very easy to make an old fashion root beer float. The key is to use an original flavor root beer. So just be sure to read content label on a root beer bottle before buying.
Chilled ice cream fluted glass (or any tall glass)
About 5 medium sized ice cubes
one large scoop of vanilla ice cream or frozen yogurt
A sprinkle of chopped pecans
One stemmed cherry
12 oz bottle of ice cold root beer
After chilling the glass for about an hour, drop the ice cubes in the glass. Add the large scoop of vanilla ice cream so that it sits on top of the ice. Sprinkle the pecans over the scoop of ice cream. Place the stemmed cherry on top of ice cream scoop. Pour the root beer into the glass down the side of the glass so as not to disturb the nuts.
Another options: Try a different flavor soda, such as a cherry soda. Of course, it wouldn't then be a root beer float but a cherry float.
Note: Don't hesitate to be creative, such as adding two scoops of ice cream, other fruits such as pineapple or strawberries.
Grab a tall tea spoon and straw.