Food and Drinks
Magical candy and sweets
Bertie Bott's Every Flavor Beans (various interesting flavors)
Fizzing Wizzbees (massive sherbet balls that make you levitate)
Drooble�s Best Blowing Gum (fill the room with bluebell-colored bubbles that refuse to pop for days)
Toothflossing Stringmints ("splintery," Hermione bought some for her dentist parents)
Pepper Imps (tiny candy that makes you "Breathe fire for your friends!")
Ice Mice ("hear your teeth chatter and squeak!")
Cockroach Clusters (real cockroaches in them, apparently)
Sugar quills (suck on them in class and you look like you're thinking)
Acid Pops (will burn a hole right through your tongue)
Jelly Slugs
Chocolate (used as an antidote for contact with the Dark Arts)
Licorice Wands
Ton-Tongue Toffee invented by George and Fred Weasley
Canary Cream - custard cream, hexed so that it transfigures the person eating it into a giant canary
Peppermint creams shaped like toads ("hop realistically in the stomach!") (Called Peppermint Toads)
Exploding bon-bons
Blood-flavored lollipops (for vampires, presumably)
Chocolate Frogs - come with a collectable card of a famous witch or wizard in each pack
Fudge Flies

Non-magical candy and sweets
Lemon drops / sherbet lemons (okay, these are Muggle candy, but Dumbledore likes them)
Treacle fudge (a specialty of Hagrid's; cements your mouth shut) Peppermint humbugs (Hagrid has some in his pockets and they were served at the welcoming feast in 1991)
Eclairs, made by the House-Elves of Hogwarts
Pumpkin pasties - Harry bought these on the Hogwarts Express
Cauldron cakes - Harry bought a stack of these for lunch on the Hogwarts Express
Chocolate
Chocolate has special properties. Not only does it make a wonderful treat, but it also serves as a particularly powerful antidote for the chilling effect produced by contact with Dementors and other particularly nasty forms of Dark Magic. Lupin carries chocolate with him on the Hogwarts Express (which seems to suggest that he expected a problem with the Dementors, or perhaps that any Defense Against the Dark Arts specialist carries chocolate with them as a matter of course. Madame Pomfrey, when she heard that Lupin had given Harry chocolate after his encounter with the Dementors, nodded approvingly and stated, "at last we have a Defense Against the Dark Arts professor who knows his remedies." She herself uses enormous blocks of Honeydukes best chocolate as an antidote in the Hospital Wing.

Honeydukes

On the Hogwarts Express food cart
Bertie Bott's Every Flavor Beans
Drooble's Best Blowing Gum
Chocolate Frogs
Pumpkin Pasties
Cauldron Cakes
Pumpkin juice (ice cold)
Licorice Wand
(A bit of everything costs 11 silver sickles and 7 bronze knuts)
Flavors of Bertie Bott's Every Flavor Beans


Thanks for Harry Potter Lexicon for the information.

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