A root beer float is a beloved American treat made by combining vanilla ice cream and root beer. There are a few different names you might hear for this classic dessert. In some regions, it's simply called a "float" or a "frosted root beer." Others might refer to it as a "black cow," "brown cow," or a "root beer snowball." One somewhat less common term is "Boston cooler," which is a similar drink made with ginger ale instead of root beer. No matter what you call it, a root beer float is a delicious and indulgent treat that's sure to satisfy your sweet tooth on a hot summer day.