Combine the steaks and all of the other ingredients in a glass dish and mix so that the marinade covers all of the steaks.
Cover and place in the fridge to allow the steaks to marinade for 4 hours.
Heat a 12" cast iron skillet over medium heat with 1 teaspoon of bacon fat in it. Spread the bacon fat around so that it coats the bottom of the pan.
Wait until the pan is steaming and allow it to steam for a minute or two. If you want, you can apply a seasoning rub to the steaks while you wait for the pan to heat up.
Once the pan is hot, start placing the steaks into the pan. Allow each steak to cook for 1-2 minutes, then flip. Allow the steaks to cook for 1-2 more minutes, then immediately remove them from the pan and place them on a plate.
Cover the plate and allow the steaks to rest for 15 minutes before serving!
Note: The steaks should be about medium rare. For less rare steaks, allow each steak to cook for 2-3 minutes on each side before removing them from the pan.