Ingredients
Method
Directions
- Heat the butter and olive oil in a skillet over medium-low heat.
- Add the onions and a pinch of salt. Cook, stirring occasionally, for 25 to 30 minutes until soft, deep golden, and caramelized.
- Preheat a grill or skillet/griddle over medium-high heat.
- Season the burger patties lightly with salt and black pepper.
- Cook the patties until browned and cooked to your preferred doneness, turning once or as needed. Cook time may vary depending on patty thickness, cooking method, and whether cooking from frozen.
- During the last 1 to 2 minutes of cooking, top each patty with a slice of Swiss cheese.
- Avoid pressing down on the patties while they cook, as this can squeeze out flavorful juices.
- Butter the outside of each slice of rye bread, then toast until golden. Toasting helps the bread hold up better and adds texture.
- Let the patties rest for 3 to 5 minutes.
- Assemble each patty melt with a patty on one slice of rye, top with caramelized onions, then finish with the second slice of rye. Serve right away.
