1️⃣ Make the secret sauce: Mix all sauce ingredients in a bowl. Refrigerate while preparing the melts.
2️⃣ Caramelize onions: Heat 1 tbsp butter in a pan over medium heat. Add sliced onions, cook for 10-15 minutes, stirring occasionally, until golden and soft.
3️⃣ Cook the patties:
Mix ground beef with Worcestershire sauce, garlic powder, salt, and pepper.
Shape into 4 thin, square patties (slightly larger than the bread).
Cook in a hot skillet for about 3 minutes per side until browned.
4️⃣ Assemble:
Butter one side of each bread slice.
On the unbuttered side, spread secret sauce, add a slice of Swiss cheese, a cooked patty, caramelized onions, cheddar cheese, and another slice of bread (buttered side facing out).
5️⃣ Grill the sandwiches:
Cook over medium heat in a pan for about 3-4 minutes per side, pressing slightly, until golden and crispy.
Flip and repeat until the cheese melts and the bread is golden brown.
6️⃣ Serve hot with extra secret sauce for dipping! 🤤🔥
👉 Want a spicy kick? Add jalapeños or a dash of hot sauce to the sauce! 🌶️
