Guild Wars 2

Hello.
I beg you where I have to make Vial of Liquid Flame, if I already have purchased material?
The Mystic and the chef we can not.

Buy the Vial of Liquid Flame recipe from Miyani and use it on your cook. Your cook will then be able to craft the Vial of Liquid Flame.

As rising dusk said, you have to buy the recipe for 10 gold at miyani (the girl at the mystic forge) then you have to get 400 cooking, and make it there