Melty patty melt with sauce (Printable Version)

Juicy beef patties and melty Swiss-cheddar cheese layered with caramelized onions and tangy creamy sauce on marble rye.

# Ingredients:

→ Beef Patties

01 - 680 grams lean ground beef
02 - 15 ml Worcestershire sauce
03 - 5 grams sea salt
04 - 3 grams freshly ground black pepper

→ Onions

05 - 3 medium Vidalia onions, thinly sliced
06 - 30 grams unsalted butter

→ Cheese

07 - 6 slices sharp cheddar cheese, cut from block
08 - 6 slices Swiss cheese

→ Bread and Butter

09 - 12 slices marble rye bread
10 - 60 grams unsalted butter, softened

→ Secret Sauce

11 - 90 grams full-fat mayonnaise
12 - 15 grams Dijon mustard
13 - 30 grams barbecue sauce
14 - 5 ml hot sauce, your preferred variety

# Steps:

01 - Whisk together mayonnaise, Dijon mustard, barbecue sauce, and hot sauce in a small bowl until smooth and creamy with no lumps.
02 - Combine ground beef, Worcestershire sauce, salt, and black pepper gently in a large bowl using your hands until evenly mixed without overworking.
03 - Divide beef mixture into six equal portions and shape into oval patties slightly wider and thin enough to fit bread slices, pressing lightly to hold shape.
04 - Melt butter in a large skillet over medium heat. Add sliced onions and cook slowly, stirring often for 20–25 minutes until onions are soft, golden, and fragrant.
05 - Heat a separate skillet over medium-high heat. Cook patties for approximately 2 minutes per side until browned but still juicy. Remove and wipe skillet clean.
06 - Spread a thin layer of softened butter on one side of each marble rye slice, preferably while bread is cool to prevent tearing.
07 - Place half the bread slices buttered side down in a skillet. Spread one tablespoon of secret sauce on each. Add about three tablespoons caramelized onions, a slice of cheddar, a cooked beef patty, a slice of Swiss cheese, more caramelized onions, a drizzle of secret sauce, and cap with remaining bread slices, buttered side out.
08 - Cook sandwiches over medium heat, pressing gently with a spatula to promote melting. When the bottom is golden, flip and repeat until cheese is melted and bread is crisp. Let rest one minute before slicing.

# Notes:

01 - Allow patties to rest five minutes after cooking to retain juices. Toast bread slowly for deep color without burning.
02 - Caramelized onions can be prepared ahead and refrigerated. Fresh use yields best flavor.