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Patty Melts with Secret Sauce — Because Sometimes You Just Need a Diner Classic

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You know what I love about patty melts? They’re a little messy, a lot melty, and they taste like the kind of food you order when you need comfort, not just lunch.

When I was a teenager, there was this little diner on Main Street — “Eddie’s” — with squeaky red booths and a jukebox that only worked when it felt like it. Their patty melts were legendary. Big enough that you had to lean forward to take a bite, with cheese dripping out the sides and onions so sweet they almost made you forget about your homework.

These days, I make them at home. And you know what? They’re every bit as good — plus I get to wear sweatpants and no one judges how many pickles I take.

Why You’ll Love ’Em

  • Crispy, buttery bread.

  • Juicy burger.

  • Cheese so melty it might drip on your plate (don’t worry, you can mop it up with a fry).

  • A tangy, creamy sauce that ties the whole thing together.

What You’ll Need (And Why I’m Not Making You Measure Everything Perfectly)

  • 1 lb ground beef: I like 80/20 for juiciness.

  • 1 large onion: Thin slices, slow-cooked till golden and sweet.

  • 8 slices rye bread: Because that’s tradition, but use what you’ve got.

  • 4 slices Swiss + 4 slices cheddar: Best of both worlds — creamy and sharp.

  • Butter: For the skillet.

  • Salt & pepper: Always.

  • Secret sauce: Mix together:

    • ½ cup mayo

    • 2 Tbsp ketchup

    • 1 Tbsp sweet pickle relish

    • 1 tsp Worcestershire sauce

Let’s Make ’Em

Step 1: Stir up your sauce. Mayo, ketchup, relish, Worcestershire. Taste it. Smile. Set aside.

Step 2: Melt a pat of butter in your skillet and toss in those onions. Medium heat, slow and steady, until they’re caramel-colored and smell like heaven — 15–20 minutes.

Step 3: Shape your beef into 4 thin patties. Season with salt and pepper.

Step 4: In that same skillet, cook the patties 3–4 minutes per side. Set aside.

Step 5: Time to build. Butter one side of each bread slice. In a clean skillet or griddle, lay down half the bread (butter side down). Stack it up: Swiss, patty, onions, cheddar, bread (butter side up).

Step 6: Grill 2–3 minutes per side until the bread is golden and the cheese is oozy. Press lightly with a spatula to help everything stick together.

Step 7: Let ’em rest for a minute before slicing. Serve with that secret sauce for dipping or just slather it on the bread before cooking.

Make It Yours

  • Feeling spicy? Swap cheddar for pepper jack.

  • Lighter mood? Ground turkey works.

  • Meatless? Use your favorite plant-based patty.

  • No rye bread? Sourdough’s a winner.

Serving Suggestions

Fries (regular or sweet potato), coleslaw, or just a pickle and a handful of chips. Honestly, a pickle spear is non-negotiable in my book.

A Little Advice About Leftovers

Eat them fresh if you can — nothing beats that crunch right out of the skillet. If you do have one left, wrap it in foil and warm it in the oven or skillet the next day. Microwaving makes it sad and soggy, and I wouldn’t do that to you.

Final Word From My Kitchen

Patty melts are a little bit burger, a little bit grilled cheese, and 100% “where have you been all my life?” kind of dinner. They’re easy, they’re satisfying, and they make any night feel like a special occasion — even if you’re just eating at the counter in your slippers.

If you make these, I wanna hear about it. Did you keep it classic or do your own thing? And did the sauce make you close your eyes for a second?

Patty Melts with Secret Sauce

A diner classic with a twist — juicy beef patties, caramelized onions, Swiss and cheddar cheeses, all sandwiched between buttery rye bread and served with a tangy, creamy secret sauce. Perfect for when you’re craving comfort food with a little extra flair.
Prep Time 20 minutes
Cook Time 25 minutes
Total Time 45 minutes
Course Comfort Food, Main Dish, Sandwich
Cuisine American
Servings 4 servings
Calories 680 kcal

Ingredients
  

  • 1 lb ground beef
  • 1 large onion thinly sliced
  • 8 slices rye bread
  • 4 slices Swiss cheese
  • 4 slices cheddar cheese
  • butter for grilling
  • salt and pepper to taste
  • 1/2 cup mayonnaise
  • 2 tablespoons ketchup
  • 1 tablespoon sweet pickle relish
  • 1 teaspoon Worcestershire sauce

Instructions
 

  • In a small bowl, combine mayonnaise, ketchup, sweet pickle relish, and Worcestershire sauce to make the secret sauce. Set aside.
  • In a large skillet, melt 1 tablespoon of butter over medium heat. Add the sliced onions and cook, stirring occasionally, until caramelized, about 15–20 minutes. Remove and set aside.
  • Divide ground beef into 4 equal portions and shape into thin patties. Season both sides with salt and pepper.
  • Cook patties in the same skillet over medium-high heat until cooked through, about 3–4 minutes per side. Remove and set aside.
  • Butter one side of each slice of rye bread. Place 4 slices, butter-side down, on a skillet or griddle over medium heat.
  • Top each with a slice of Swiss cheese, a cooked patty, caramelized onions, a slice of cheddar cheese, and another slice of bread, butter-side up.
  • Cook until the bread is golden brown and the cheese has melted, about 2–3 minutes per side.
  • Remove from the skillet and let rest for 1 minute. Slice in half and serve immediately with the secret sauce on the side or drizzled over the top.

Notes

For an extra indulgent touch, toast the rye bread lightly before assembling. You can also swap out Swiss or cheddar for provolone or pepper jack for a twist.

Nutrition

Calories: 680kcal
Keyword caramelized onions, cheeseburger sandwich, patty melt, rye bread, secret sauce
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