2 Tbsp. dark Mexican chili powder (or any good quality chili powder)
1 Tbsp. cocoa
1 Tbsp. finely ground coffee or espresso
1 tsp. coarse salt
1 tsp. freshly ground black pepper
1Make sure your steak is at room temperature. Combine all the rub ingredients and rub it all over both sides of the steak(s); let them sit for about 10 minutes.
3Heat your grill, a cast iron skillet or grill pan over medium-high heat until it’s hot but not smoking. (If you don’t have cast iron, use a regular skillet and drizzle with canola oil.) Put the steak onto the grill or into the pan and cook for 4-5 minutes per side (2-3 minutes for bison steaks) for medium-rare. Let them rest, tented with foil so that they don't cool down, for 10 minutes before slicing.