Dijon mustard
Dijon mustard appears in 6 of the 123 recipes on Burgerman, roughly 5% of the library. In these builds it is what most people actually taste first, and small changes to it move a recipe more than the patty does. You will find it in Fat Mimolette Bacon & Fried Onion Burger, Copycat McDonalds Filet-o-Fish Sandwich and Bang Bang Burgers, among others. The highest-scoring recipe using it is Fat Mimolette Bacon & Fried Onion Burger at 8.4 out of 10. It turns up most often alongside black pepper, mayonnaise, salt.
