Step 1

In a small bowl mix together rub ingredients. Rub all over steaks and allow steaks to come to room temperature.

Step 2

Meanwhile make the sauce.

Step 3

In a small sauce pan add all the sauce ingredients. Place the pan over medium low heat and cook until slightly thickened about 15 minutes.

Step 4

Taste the sauce and adjust if necessary. If slightly bitter add a little maple syrup.

Step 5

Preheat a large cast iron skillet over medium-high heat. Add olive oil to the pan to coat.

Step 6

Place the steaks in the pan and cook without moving for 4 minutes or until a deep caramelized crust is achieved. Flip steaks and cook a further 3 minutes for medium rare or until desired doneness.

Step 7

Remove steaks from pan. Place on platter and loosely cover with foil. Let steaks rest at least 5 minutes.

Step 8

Slice steak or serve whole with espresso sauce.