If you were not playing GW2 during the Dragon Bash event, you may not know these exist:
These are counterparts to other "Best tier" (and very expensive) foods, like Rare Veggie Pizza, or Sweet and spicy butternut squash soup. The Dragon bash foods only have 20 minute duration, but that one hour comes at less than 3s, compared to 15s+ for the others.
These are starting to creep up in price though, so you may want to stock up while you can.
Edit: There is also this one http://wiki.guildwars2.com/wiki/Kralkachocolate_Bar for Karma and/or healing power.
By : HurtRedditsFeelings