You need to be able to make purple top level recipes. There are a bunch of basically equivalent foods and drinks with differing ingredients and they are not that hard to get. You can often find the foods/drinks on the guild stores for gold.

There are also a lot of crafted foods that provide other interesting combinations of buffs, and there are some where you have to get the recipes by doing quest lines, plus a few good ones from events.

You can also make all the potions and poisions including crown store equivalents and those that drop from thieves troves and the like that mix invisibility and speed buffs if you have enough alchemy and you have the passives to use 3 ingredients at once.

For players at or above CP 150:

• Most (not all) kinds of purple food that are at that level are the equivalent of crown food. You can craft these via Provisioning or buy them in guild stores.
• You can craft equivalent potions via Alchemy or buy them in guild stores. They're called Essence of Health, but check the details, since many other potions are called Essence of Health too.