In a bowl, mix together all the ingredients for the marinade and pour into a food safe bag or bowl. Lightly score the outside of your ribeyes so the marinade penetrates deeper, then place the steaks in the marinade. Seal and place in the fridge to marinate for 4 hours.
Preheat your grill to a medium high heat temperature (around 375F) for direct cooking.
Pull your steaks out of the marinade and discard excess marinade. Add the steaks to the grill to cook for about 3 minutes per side or until they are 120F internal for medium rare. Make sure to move your steaks around if they begin burning or pull them away from the heat. Once the steaks are cooked, pull them off and keep warm until ready to serve.
Kick up your grill to high heat (around 400F) and add a cast iron skillet with a little bit of oil. Add your sliced mushrooms first and let cook for about 7-8 minutes to sweat out the water making sure to stir frequently. Once the mushrooms have sweat, add your minced garlic and let caramelize for 3-4 minutes. Deglaze the skillet with some bourbon and let simmer for 1 minute. Finally, add your heavy cream to the skillet and let slowly simmer until the sauce has thickened (about 5-8 minutes) making sure to stir frequently. Right before pulling off, add your crumbled blue cheese and mix together into the sauce and cook for 1-2 more minutes. Pull off and let cool.
Slice your steaks up, serve with the sauce, garnish with chopped parsley and enjoy!
Bourbon Marinated Ribeyes