5 Ingredients or Less
So clearly, there are some "exceptions" to this round.
I saw Justin Warner throw a huge chunk of butter into a pan for his Hollandaise sauce. He did not choose butter as an ingredient.
I saw McCargo make an entire dredge (flour and spices), none of which were ingredients that he chose.
Obviously you have to just give them some obvious exception like salt and pepper (it would be a shame if everyone had to burn 2 of their ingredients just to season their food), but where do they draw the line?