And here we go again. There are various ingredients that when cooked into their specific categories will raise the food's phlegm values. You may find all the variable ingredients in the similarly named wiki page

Off the top of my head though, the ingredients that raise phlegm are : Crowberry in berry foods with a variable berry ingredient, barley flour, sugar caps/ lavander blewits, bunny or cougar meats, turkey or argopelter wings cooked, without being cooked into foods. if you cook the ingredients into bigger foods then turkey stuff. Sparrow hardboiled eggs. Snail cooked bug foods, Acorns for nuts. Check the rest on the wiki, as there are both pages for the various timer foods and for the variable ingredients. Even a little guide to start you up

Exactly 6.022 x 10^23 worth of Lach molecules.