A root beer float is a classic dessert drink made by combining root beer, a sweet, carbonated beverage flavored with roots like sassafras and vanilla, with a scoop of vanilla ice cream. The ice cream adds creaminess and sweetness, creating a delightful contrast with the fizzy root beer. To make a root beer float, simply pour chilled root beer into a glass and add a scoop of vanilla ice cream on top. The ice cream will float on the surface, creating a frothy, delicious treat that is enjoyed by many, especially during warm weather.