Marinate the steaks.
Mix the bourbon whiskey, honey, steak sauce, Creole mustard, and Cajun seasoning in a bowl.
Cover the steaks and refrigerate for at least 2 hours.
Preheat your grill to medium-high heat.
Remove the steaks from the marinade, letting any excess drip off.
Place them on the grill.
Grill each side of the steaks for about 6-7 minutes or until desired doneness is reached.
The internal temperature should hit at least 135°F for medium-rare.
While the steaks are grilling, melt butter in a skillet over medium heat.
Add mushrooms and onions, sautéing until soft and golden brown.
Serve the grilled steaks on a hot platter.
Top with sautéed mushrooms and onions.
Pair with your favorite sides and enjoy!