Flatiron Steak Sandwich with Shiner Bock Mushrooms and Fries
- Ely Perea
- Mar 2, 2021
- 2 min read

While messing around with recipes, I decided to add some Shiner Bock to sautéed mushrooms. These mushrooms came out surprisingly flavorful and I knew I had to find the perfect pairing for them. After using them for sides many times, I decided they would be perfect in a steak sandwich. This recipe uses 2-zone cooking on a charcoal grill with a cast-iron pan for all components.
Ingredients
1 Flatiron steak
Worcestershire Sauce
1 tsp garlic powder
1 tsp black pepper
2 tbsp Hardcore Carnivore Black
Hoagi buns
Provolone cheese
Mushrooms
1 small package sliced Cremini Mushrooms - about 8oz
Extra Virgin Olive Oil
1/4 stick of butter
1 clove garlic, minced
1/4 cup Worcestershire Sauce
1/4 bottle of Shiner Bock
Salt
Pepper
Fries
2 potatoes
Extra Virgin Olive Oil
1 clove garlic, minced
1 tbsp paprika
1 tsp cumin
1 tsp cayenne pepper
2 tsp salt
Instructions
Coat one side of the flatiron steak with Worcestershire Sauce
Season lightly with garlic powder and black pepper
Season with Hardcore Carnivore Black
Pat seasonings into the steak
Flip steak over and repeat steps 1 through 4
Allow steak to sit at room temperature for 15 minutes
Set up charcoal grill for 2-zone cooking. Allow temp to stabilize at 450°
Sear the steak on the hot coal side of the grill for 2 minutes on each side (4 minutes total)
Transfer the steak over to the cool side of the grill
Cook until internal temp reaches 125° (usually start mushrooms here)
Remove from grill and let the steak rest for 10-15 minutes
Cut steak into thin strips

Mushrooms
Wash sliced cremini mushrooms
Place cast-iron pan on the hot side of the grill
Lightly coat the pan with olive oil
Add mushrooms to the cast-iron pan, cook for 5-7 minutes until mushrooms have desired char. Stir the pan throughout the cook
Add 1/4 stick of butter to the pan, mix in with the mushrooms
Once butter is fully melted, add minced garlic, Worcestershire, and Shiner Bock to the pan
Allow mixture to reduce slightly - about 2 minutes
Add salt and pepper to taste
Remove mushrooms from cast-iron pan and cover with foil until ready
Leave the remaining oils and beer in the pan to cook the fries
Fries
Using a fry cutter, slice the potatoes into fries and place in a large bowl
Coat the fries with olive oil
Add minced garlic, paprika, cumin, cayenne pepper, and salt to bowl
Mix everything together with your hands, ensuring fries are evenly coated with all the seasonings
Place the seasoned fries back on the cast-iron pan. Times will vary; cook until desired crispiness (usually 5-10 minutes)
Remove from the cast-iron pan
Sandwich
Open up the hoagie buns and spread butter on the internal surface
Place directly on the grill grates - butter side down - to toast, usually just a few seconds
Add steak, mushrooms, and provolone cheese to the sandwich
Place Sandwich on the cool side of the grill until the cheese melts
These are an excellent game day snack and a great opportunity to use some Shiner Bock mushrooms.
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