Imitation is the highest form of flattery…and flavor! These Copycat In-N-Out Animal Style Burgers layer juicy patties with rich caramelized onions and crave-worthy Animal Style sauce. Top with crispy lettuce for some crunch, all served on our delicious Hearth Potato Sliders. It’s the perfect bite-sized slider for any tailgate or cook out.
Ingredients
1 package
1 tablespoon
butter
1 tablespoon + 1 teaspoon
oil, divided
3 cups
finely chopped yellow onions
3/4 teaspoon
salt, divided
1/2 teaspoon
black pepper
4 tablespoons
water
1 pound
ground beef
1/2 teaspoon
black pepper
3 tablespoons
yellow mustard
6 slices
American cheese
Sauce
1/2 cup
mayonnaise
1 1/2 tablespoons
ketchup
1 tablespoon
pickle relish
1 teaspoon
sugar
3/4 teaspoon
white vinegar
Toppings
Shredded lettuce
Directions
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Step 1
In a small bowl, combine the mayonnaise, ketchup, relish, sugar, and vinegar. Stir until smooth. Cover and refrigerate until ready to use.
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Step 2
Heat the butter and oil in a skillet over medium-low heat. Add the chopped onions and ½ teaspoon of salt. Stir to coat.
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Step 3
Cook for 20–25 minutes, stirring occasionally and adding a tablespoon of water as needed to deglaze the pan and prevent burning. Once the onions are deep golden, remove from heat.
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Step 4
Divide the ground beef into 6 equal portions and form into balls. Flatten each into a patty slightly wider than your buns. Season both sides with salt and pepper.
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Step 5
Heat 1 teaspoon of oil in a large skillet or griddle over medium-high heat. Place the patties in the skillet and cook for about 2 minutes. Spread mustard on the top of each patty, then flip. Top each with slices of American cheese and cook for another 1–2 minutes, until the cheese is melted and the patties are cooked through.
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Step 6
Spread the prepared sauce on the bottom buns. Place a cheesy, mustard-crusted patty on each bun and spoon caramelized onions over the top. Add shredded lettuce if desired. Finish with the top bun and serve.
