How to Make It
In a small bowl, mix the ghost chile powder and salt.
Light a grill and oil the grate. Form the meat into four 5-inch patties and season with the chile salt. Grill over moderately high heat until lightly charred on the bottom, 3 minutes. Flip the burgers, top with the cheese and grill until medium-rare, about 3 minutes more.
Set the burgers on the buns. Spread the tops with mayonnaise and garnish with sliced red onion, pickled jalapeños and cilantro; serve.
Ghost chiles, also called bhut jolokia, are about 150 times hotter than jalapeños.