Just some extra fact if you intend to cook alot for massive CP gain.

When you reach 1sec cook time. Clearing an advanced cooking utensil will take around 19m30s. Not 15 min as some might say, because after each craft there is a 0.2-0.3 sec delay, and adding those together 900 times: (0.3x900=270) > 270/60= 4.5 (4m 30s)

270 seconds = 4 min 30 sec
900 seconds = 15 min
Total = 19 min 30 sec

Items to reach 1sec cook time:
Silver Embroidered Cook's Clothes - http://bdocodex.com/cn/item/14019/
Canape Weapon & Costume Set - http://bdocodex.com/cn/item/21135/
Teff Sandwich - http://bdocodex.com/cn/item/9218/
Spongy Teff Bread - http://bdocodex.com/cn/item/9299/
Alchemy Stone of Life - http://bdocodex.com/cn/search/

Cook's Clothes is -1 sec decrease per level
Canape is -2 sec decrease
Teff Sandwich is 0.5 sec decrease
Spongy Teff Bread is 0.3 (if you cannot get the Teff Sandwich, use this instead)
Alchemy stone > Get the best if you can, buf if not, try get atleast any of them. Any time decrease helps.

Even some event items gives decrease time, like recently the pool party event near olvia, vendor that sells this -0.5s cook time item.

standard recipe for cp cooking.
you get 2,5 flour on average from one grain by grinding.
this also a great item for afk processing a whole night, because of 0,1lt weight each flour.
for fruit you want to use strawberries from the fruit vendor Milano Belucci in calpheon city.
Leavening agent is sold by every cooking-npc.