I decided to fancy this float up a bit by whipping it all together in the blender, and then putting chocolate sprinkles on the rim of the glass and adding whipped cream. If you're not inclined to get that fancy, you can totally just do the ice cream and root beer portion of this recipe and skip the rest. The entire thing is pretty delicious as a package deal, though — I don't recommend skipping a thing.
Combine the root beer and the ice cream together in a blender, and blend until smooth. Dip the edge of your glass in chocolate syrup, then roll the rim in the chocolate sprinkles. Pour the root beer mixture into the glass and top with whipped cream. Drizzle chocolate syrup and top with a cherry.