Taco seasoning
Taco seasoning is called for by exactly one recipe on Burgerman. In these builds it never shows up on its own, but pulling it out of a recipe is immediately noticeable. It is used in Seven Layer Sliders. The highest-scoring recipe using it is Seven Layer Sliders at 8.1 out of 10. It turns up most often alongside jalapeno, tomato, white onion.
