Chocolate Frogs are frogs made of chocolate, and are very popular wizarding sweets. They are each packaged with a collectible card displaying a magical picture and brief biography of a famous witch or wizard of medieval to modern times. Cards named in the Harry Potter series include: Merlin, Dumbledore, Nicolas Flamel, Agrippa, Ptolemy, Morgana, Hengist of Woodcroft, Alberic Grunnion, Circe, Paracelsus, Druidess Cliodna, Crospin Conk, Bertie Bott, Felix Summerbee, Cassandra Vablatsky, Ignatia Wildsmith, and the four founders of Hogwarts. According to a web chat with the author, Harry and his friends are eventually featured on a series of Chocolate Frog cards; Ron calling it his finest hour .[27]
Butterbeer is the drink of choice for younger wizards. Harry is first presented with the beverage in Harry Potter and the Prisoner of Azkaban. Although House-elves can become intoxicated on Butterbeer, the amount of alcohol contained in Butterbeer has a negligible effect on Witches and Wizards. In the sixth book, however, Harry wonders what Ron and Hermione might do at Professor Slughorn's Christmas party under the influence of Butterbeer, indicating that it could potentially lower inhibitions. J. K. Rowling said in her interview to Bon Appétit magazine that she imagines it to taste a little bit like less-sickly butterscotch. Butterbeer can be served cold or hot but either way it has a warming effect. Roald Dahl used a similar word play in his book Charlie and the Chocolate Factory in chapter 23 when he mentioned the Oompa-Loompas getting drunk on butterscotch and buttergin.
When Harry Potter was in the Hogwarts infirmary after his skirmish with Professor Quirrell and Voldemort in 1992, he received many treats from his admirers. Whilst Harry was unconscious, someone consumed all of the chocolate frogs. During his bedside visit, Dumbledore posited that Ron Weasley had done it, so Harry could have the cards without going to the trouble of eating the frogs.
One of the more charming things about J.K. Rowling's Harry Potter series, beside its slam-bang action and realistic portrayal of young people, is its believability. It's a complete world: everything fits, down to the smallest of details. In fact, one of the details that sticks in most people's minds is one of the first magical things Harry encounters: the chocolate frog.
