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Philly Cheesesteak Sauce

This rich, savory sauce coats tender sliced steak and melted cheese with layers of flavor, capturing an authentic Philly taste in about 15 minutes using common kitchen ingredients.
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Prep Time 5 minutes
Cook Time 10 minutes
Total Time 15 minutes
Servings: 6 sandwiches
Course: Condiment
Cuisine: American
Calories: 95
Ingredients Equipment Method Notes

Ingredients
  

Main
  • 3 tablespoons butter
  • 1 large yellow onion diced finely
  • 1/4 cup pepperoncini peppers chopped (plus 2 tablespoons of the liquid)
  • 1/2 cup mayonnaise
  • 2 tablespoons ketchup
  • 1 tablespoon Worcestershire sauce
  • 1 teaspoon garlic powder
  • 1/2 teaspoon black pepper
  • 1/4 teaspoon cayenne pepper optional, for heat
  • Salt to taste

Equipment

  • medium skillet or saucepan
  • Wooden spoon or spatula
  • Measuring spoons and cups
  • Small mixing bowl
  • Knife and cutting board
  • whisk (optional but helpful)

Method
 

  1. Cut your yellow onion into small, even pieces about the size of peas.
  2. Place your skillet over medium heat and add the butter, letting it melt completely, about 1-2 minutes.
  3. Add the diced onions to the melted butter and stir constantly for 8 to 10 minutes until the onions turn golden brown and caramelize.
  4. Stir in the chopped pepperoncini peppers and 2 tablespoons of their liquid, cooking for about 1 minute while stirring constantly.
  5. Turn off the heat and let the onion and pepper mixture cool for about 2 minutes to prevent mayonnaise from curdling.
  6. In a small mixing bowl, whisk together the mayonnaise, ketchup, and Worcestershire sauce until smooth and well combined.
  7. Pour the mayonnaise mixture into the cooled onion and pepper blend, stirring constantly until evenly mixed and uniform in color.
  8. Add garlic powder, black pepper, and cayenne pepper (if using), then stir well. Taste and adjust salt as needed.

Notes

Do not skip caramelizing the onions for depth of flavor. This sauce is versatile and improves in flavor after sitting refrigerated for a few hours.