Colby Jack
Colby Jack appears in 2 of the 123 recipes on Burgerman, roughly 2% of the library. In these builds it is doing the melting and the richness, which is usually what separates a good burger from a dry one. You will find it in Homemade Smash Burgers and Best Hamburger Ever, among others. The highest-scoring recipe using it is Homemade Smash Burgers at 8.4 out of 10. It turns up most often alongside black pepper, ground beef, cheddar.
