- 1 pound lean ground beef (90% lean)
- 1/4 cup dark beer (such as Guinness®)
- 1 (6 inch) serrano pepper, diced
- 2 tablespoons butter, softened
- 4 slices Monterey Jack cheese with jalapeno peppers
- Preheat an outdoor grill for high heat and lightly oil the grate.
- Mix ground beef, beer, serrano pepper, and butter together in a bowl; form into 4 patties.
- Cook the burgers on the preheated grill for 5 minutes. Flip and continue cooking for 3 minutes. Top each burger with 1 slice Monterey Jack cheese and cook until burgers are no longer pink in the center and the juices run clear, about 2 minutes more. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).