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Blackstone Steak Sandwich

Steak sandwiches are a timeless favorite, combining rich, hearty steak with all the fixings. This Blackstone Steak Sandwich recipe elevates the classic to a new level, featuring tender, juicy steak, smoked Gruyère cheese, and a tangy horseradish aioli. It’s an ideal dish for those who love hearty, flavorful sandwiches and lots of protein to satisfy you!

Blackstone Steak Sandwich

Blackstone Steak Sandwich

You will love this recipe for its simplicity and how quickly it comes together. The steak, seasoned with a blend of salt, pepper, onion powder, and granulated garlic, is the star of the sandwich. We cook it on a Blackstone griddle, one of my favorite ways to cook steak. The smoked Gruyère cheese adds a depth of flavor that complements the steak, while the horseradish aioli brings zesty, creamy flavors.

If you don’t own a Blackstone griddle, a regular grill, stovetop griddle, or even a heavy skillet can cook the steak and toast the buns. The key is to maintain medium-high heat for a good sear on the meat and a golden-brown on the buns. Adjustments can be made to the cooking time based on the thickness of the steak and what temp you like your steak to finish at. Use the guide below and a high quality thermometer to keep an eye on things.

WELL140° 145°

Our easy steak sandwich is suitable for various occasions. It’s an excellent option for a weekend family lunch, a gathering with friends, or a special dinner. The recipe can be scaled up for larger groups or reduced to serve just one or two people. The sandwich pairs well with various sides like salads, fries, or roasted vegetables, making it easy to cater to different tastes and dietary preferences.

This recipe is a must-try for anyone who enjoys a good steak or a great sandwich. Its straightforward preparation and the flexibility to modify and adapt to different cooking equipment and ingredients make it a versatile and appealing option for many meals.

Variations and Substitutions

There are many ways to change up this dish to suit your own tastes or what you have in the fridge. Different cuts of steak, such as ribeye or sirloin, can be used, depending on personal preference and availability. The type of cheese can also be changed; cheddar, provolone, or blue cheese are all great options.

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Make it keto

For those looking for a keto option, keto buns or lettuce wraps can be substituted for the hamburger buns, or you can omit the “sandwich” portion of this completely and serve it as is.

Why you’ll love this dish…

  • Rich and Flavorful: The combination of seasoned steak and smoked Gruyère is perfect!
  • Creamy Aioli Kick: The horseradish aioli adds a creamy, spicy twist that complements the steak perfectly.
  • Customizable: Adjust the amount of horseradish in the aioli to suit your spice preference.
  • Versatile Meal: Perfect for a weekend lunch, a casual dinner, or a special occasion.
  • Great for Grilling: An excellent recipe to make the most of your Blackstone griddle.

More Blackstone Recipes here!

Blackstone Steak Sandwich

Blackstone Steak Sandwich shopping list

Wondering if you have to hit the store? Here’s the list of items you’ll need to make this recipe. For specific amounts, please refer to the printable recipe card at the bottom of the post.

  • Steak
  • Salt
  • Black pepper
  • Onion powder
  • Granulated garlic
  • Hamburger buns
  • Butter
  • Onions
  • Smoked Gruyère cheese
  • Horseradish
  • Mayo

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Blackstone Steak Sandwich

How to make Blackstone Grilled Steak Sandwich

This is just the overview so you can see what you’re actually getting into here. When you are cooking, you’ll want to use the full recipe at the bottom of the page.



Preheat your Blackstone griddle over medium-high heat. Mix together the salt, black pepper, onion powder, and granulated garlic for seasoning the steak.



Butter the hamburger buns with 2-3 tablespoons of butter and place them butter-side down on the griddle. Toast until brown, then set aside.



Use the remaining butter on the griddle for the onions. Sauté them for about 5 minutes, flipping frequently.



Place the steaks on the griddle, cooking each side for 3-4 minutes.

Rest for 10 minutes before slicing.



While the steaks cook, whisk together the aioli ingredients in a separate bowl.



Place the cheese on the sliced steak on a baking sheet, and melt the cheese under a broiler for 2-3 minutes.



Assemble the sandwiches and enjoy while hot!

Try our Traeger Steak Sandwich too!

Blackstone Steak Sandwich

Blackstone Steak Sandwich FAQ

Can this dish be made in advance?

Steak will be at peak quality right after it is cooked, but if you would like to take this sandwich for lunches at work or school, you can prepare the individual pieces in advance. Cook the steak and onions, and prepare the aioli a day ahead. Reheat the steak and onions before assembling the sandwiches.

What’s the best way to store and reheat this dish?

Store the components separately in airtight containers. Reheat the steak and onions gently in a pan, the microwave, or an air fryer. Assemble the sandwiches fresh.

Can I use different types of cheese?

Yes, feel free to experiment with other cheeses like cheddar or provolone for a different flavor profile.

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Blackstone Steak Sandwich
Blackstone Steak Sandwich

More great sandwiches to love!

Blackstone Steak Sandwich
Yield: 4 servings

Blackstone Steak Sandwich

Blackstone Steak Sandwich
Prep Time 5 minutes
Cook Time 20 minutes
Total Time 25 minutes


Steak & Seasoning

  • 32 ounces steak
  • 1 teaspoon salt
  • 1 teaspoon black pepper
  • 1 teaspoon onion powder
  • 1 teaspoon granulated garlic


  • 4 hamburger buns
  • 4 tablespoons butter
  • 2 medium onions, sliced
  • 8 ounces smoked Gruyère cheese

Horseradish Aioli

  • 2 teaspoons horseradish
  • 1/2 cup mayo (I use Kewpie or Duke's)
  • 1/2 teaspoon garlic powder


  1. Preheat your Blackstone over medium-high heat.
  2. Mix 1 teaspoon each of salt, black pepper, onion powder, and granulated garlic.
  3. Butter all the hamburger buns with 2-3 tablespoons of butter. Place butter-side down on the griddle and let brown. Remove and set aside once they are toasted.
  4. Put the remaining butter down on the griddle and place the sliced onions on the butter. Sauté for 5 minutes, flipping frequently.
  5. Put the steaks on the preheated griddle and cook for 3-4 minutes per side.
  6. While the steaks are cooking, whisk together the aioli ingredients.
  7. Once the steaks are cooked to your liking, remove them from the griddle and rest for 5 minutes.
  8. After resting, slice against the grain and build your sandwiches with the steak, cheese, sauteed onions, and horseradish aioli.
  9. If desired, you can melt the cheese on the sandwiches by briefly putting the sliced steak with cheese on top on a baking sheet under a broiler for 2-3 minutes and then building the sandwiches.

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Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 1310Total Fat: 94gSaturated Fat: 38gTrans Fat: 1gUnsaturated Fat: 47gCholesterol: 324mgSodium: 1560mgCarbohydrates: 30gFiber: 2gSugar: 6gProtein: 82g

Nutrition data provided here is only an estimate. If you are tracking these things for medical purposes please consult an outside, trusted source. Thanks!

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Nicole Johnson
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Nicole Johnson, a self-taught expert in grilling and outdoor cooking, launched Or Whatever You Do in 2010. Her blog, renowned for its comprehensive and creative outdoor cooking recipes, has garnered a vast audience of millions. Nicole's hands-on experience and passion for grilling shine through her work. Her husband, Jeremiah Johnson, also plays a pivotal role in recipe development, adding his culinary flair to the mix. Together, they form a dynamic duo, offering a rich and varied outdoor cooking experience to their followers.

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