Guinness Marinated Flat Iron Steak - Grate Recipe | GrillGrate

Ingredients

• flat iron steak, 1.5 lbs
• 1 tbsp Killer Hogs Steak Rub
• 12 oz Guinness Stout Beer
• 2 oz Worcestershire Sauce
• 2 oz Soy Sauce
• 1 tsp Killer Hogs AP Seasoning
• 2 tbsp Salted Butter
• 1 Small Shallot, Finely Chopped
• 5 Cloves Garlic, Minced
• 8 oz Baby Bella Mushrooms
• 1/2 tsp Kosher Salt
• 1/2 tsp Black Pepper
• 1/4 cup Soy Sauce
• 1/4 cup Worcestershire sauce
• 1 tbsp Balsamic Vinegar
• 1 cup Guinness Stout beer
• 1 tsp Corn Starch
• 1 tsp Cold Water