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+ servings
Stacked steak grilled cheese sandwiches cut in half.
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Steak Grilled Cheese

Steak Grilled Cheese is the ultimate lunch or easy dinner to make with leftover grilled steaks. Grilled sirloin sliced thin, layered with sautéed onions and Swiss cheese on buttery toast.
Prep Time10 minutes
Cook Time20 minutes
Total Time30 minutes
Course: Sandwiches
Cuisine: American
Keyword: grilled cheese with steak and onions, leftover steak sandwiches, steak and cheese sandwiches
Servings: 4 Sandwiches
Calories: 867kcal
Author: Milisa

Ingredients

For the Steak

  • 1 pound sirloin steak
  • 1 tablespoon olive oil
  • 2 tablespoons steak rub

For Grilled Cheese Sandwiches

  • 1 large onion sliced thin
  • 6 tablespoons softened salted butter divided
  • ½ teaspoon kosher salt
  • ½ teaspoon fresh ground pepper
  • 8 slices wheat bread
  • 8 slices Swiss cheese

Instructions

Grill the Steak:

  • Prepare a grill fire to 350° using hickory chunks for smoke flavor.
  • Season steak with olive oil and steak rub on both sides.
  • Cook over a hot grill fire, turning after 5 minutes and continuing to cook until steak reaches 130° or desired doneness using a digital meat thermometer.
  • Remove from grill. Rest 10 minutes. Slice steak into thin strips. If making ahead, cool to room temperature, wrap and refrigerate.

Make the Sandwiches:

  • Slice onions thin and cook in melted butter over medium heat. Season with salt and pepper and stir occasionally until onions are caramelized.
  • Add sliced steak to the pan to heat slightly, skip this step if you are not using leftovers.
  • Butter one side of each slice of bread.
  • Heat a griddle and place 2 slices of bread, butter side down.
  • Layer each with Swiss cheese and steak slices.
  • Add a layer of onions and another slice of Swiss.
  • Top with remaining bread slices, butter side up.
  • Cook 2- 3 minutes per side until sandwiches are golden brown and cheese is melted.
  • Repeat with remaining ingredients.
  • Slice and serve immediately.

Notes

Optional Add- Ins:
  • Sautéed mushrooms
  • Cheddar Cheese
  • Boursin Cheese
  • Mozzarella Cheese
  • Candied Jalapenos
Storage: Leftover steak and grilled cheese sandwiches can be wrapped in plastic wrap and stored in the refrigerator up to 2 days.
Reheat: Wrap sandwiches in aluminum foil and cook in oven or toaster oven at 350° for 8- 10 minutes.

Nutrition

Serving: 1g | Calories: 867kcal | Carbohydrates: 32g | Protein: 54g | Fat: 57g | Saturated Fat: 29g | Polyunsaturated Fat: 22g | Trans Fat: 1g | Cholesterol: 209mg | Sodium: 762mg | Fiber: 3g | Sugar: 5g