Ultimate Patty Melt with Secret Sauce

Craving the perfect comfort food? This Patty Melt is loaded with a juicy beef patty, sweet caramelized onions, gooey melted cheese, and a tangy homemade secret sauce. It’s a classic diner favorite made easy at home, ready in under an hour.

With just 10 minutes of prep, you’ll have a melty, indulgent sandwich that’s perfect for dinner, lunch, or a special weekend treat.

Why You’ll Love This Patty Melt Recipe

• Caramelized onions: Slowly cooked until golden and jammy for deep flavor.
• Double cheese: Swiss and cheddar make every bite extra gooey and decadent.
• Homemade secret sauce: A zesty blend of mayo, ketchup, mustard, and spices adds next-level flavor.
• Easy and satisfying: All the indulgence of a diner classic with minimal effort.

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Ingredients

Secret Sauce:

• 1/4 cup mayonnaise
• 2 tablespoons ketchup
• 1 tablespoon Dijon mustard
• 1 teaspoon pickle juice

• 1/4 teaspoon paprika
• 1/4 teaspoon garlic powder

Patty Melts:

• 2 tablespoons olive oil
• 2 large onions, thinly sliced
• 12 oz 85/15 lean ground beef
• 1/2 teaspoon salt
• 1/2 teaspoon black pepper
• 1 teaspoon Worcestershire sauce
• 8 slices rye bread
• 3 tablespoons unsalted butter, softened
• 4 Swiss cheese slices
• 4 cheddar cheese slices

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Instructions

1. Make the Secret Sauce:
Combine mayonnaise, ketchup, Dijon mustard, pickle juice, paprika, and garlic powder in a small bowl. Whisk until smooth and set aside.

2. Caramelize the Onions:
Heat olive oil in a skillet over medium-low heat. Add sliced onions and cook for 30–40 minutes, stirring occasionally, until golden and jammy. If the onions stick, add a splash of water.