Jul 14 2026
RestaurantsFat Willy'sSlug Bug Recipe

Slug Bug Recipe

Inspired by Fat Willy's
Time30m
Serves2

Fat Willy's patty melt. American & Swiss cheese on grilled marble rye with sauteed onions.

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Ingredients

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Patty Melt

Method

Preparation

  1. 1

    Prepare the Onion

    Slice the medium onion into thin rings.

  2. 2

    Cook the Onions

    In a skillet over medium heat, melt 1 tablespoon of butter. Add the sliced onions, sprinkle with a pinch of salt, and sauté for about 10-15 minutes until they are golden brown and caramelized. Stir occasionally to prevent burning.

  3. 3

    Shape the Patties

    In a large bowl, combine the ground beef with salt and black pepper. Form the mixture into two equal-sized patties.

Cooking

  1. 4

    Cook the Patties

    In the same skillet used for the onions, add another tablespoon of butter over medium-high heat. Once hot, add the patties and cook for about 4-5 minutes on one side, then flip the patties.

  2. 5

    Add Cheese

    After flipping the patties, place two slices of American cheese and two slices of Swiss cheese on top of each patty. Cook for an additional 4-5 minutes until the cheese is melted and the patties are cooked to your desired doneness.

  3. 6

    Toast the Bread

    While the patties are cooking, in another skillet or griddle, melt 2 tablespoons of butter. Place two slices of marble rye bread on the skillet and toast until golden brown. Repeat with the remaining bread once the first two slices are done.

Assembly

  1. 7

    Assemble the Patty Melt

    On one slice of toasted marble rye, place a cheeseburger patty topped with caramelized onions. Top with another slice of toasted rye to form a sandwich. Repeat for the second patty melt.

  2. 8

    Serve

    Cut the patty melts in half diagonally and serve hot with your favorite side, such as fries or a salad.

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