This is my favourite hobby as its really quick to get LPs and money by doing it, you just need several sims in a room with a stove and toaster for each person and then do the 1 minute option over and over and within about an hour or so (depending on how many sims you have) you should be able to find all the utensils as long as you have unlocked all 6 levels! But there will be so many dishes laying around you should have a few sims there to clean them up. How Do I Have So Many LPs explains this in more detail.
Patrick says: “have all ten Sims in the room cooking and cleaning. That second it takes to present the dish can be used by the previous Sim to clean. I know it seems small, but over the course of that hour, ten Sims as opposed to six will yield a lot of money. ” And if you send your level six chefs to do another hobby then, restart them on the cooking hobby to get more money and an LP (as they will start at level one again they will get the rewards for levelling up)