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Root beer

Root beer is a sweet North American soft drink traditionally made using the root bark of the sassafras tree Sassafras albidum or the vine of Smilax ornata (known as sarsaparilla; also used to make a soft drink called sarsaparilla) as the primary flavor. Root beer is typically, but not exclusively, non-alcoholic, caffeine-free, sweet, and carbonated. Like cola, it usually has a thick and foamy head. A common use is to add vanilla ice cream to make a root beer float.

Root beer  Click to go to Wikipedia