63-74 train with Tuna (10 gp profit)
74-86 Lobsters (19 gp profit)
86-99 Swordfish (about 25 gp profit).
But you need to buy everything for normal price.
Just buy a bond for $3 and do wines. Costs you around $15 in gold but saves you 30 hours. 35-99 cooking took me just barely 35 hours doing it semi efficiently. You could alternatively do something until 92 (halfway to 99) such as sharks then do wines for the final stretch
Cooking isnt really a good money making method. There are much better ways. Make money a different way and cook sharks with little to no loss. Maybe even profit and in the long run you'll do less hours
once you get to the level where youll stop burning sharks (92? correct me if im wrong) you can make some profit. its not a skill where youll make bank but it is very possible to make some cash. just play around with prices of raws/cooked and youll find something that will net you a bit of cash.