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Copycat In-N-Out cheeseburger

Easy Copycat In-N-Out Cheeseburger

April King
When we are craving a good cheeseburger this Easy Copycat In-N-Out cheeseburger is our go to recipe. We especially love to make our double double cheeseburger “animal Style”. Animal style cheeseburgers are on their “secret” menu and come with yellow mustard fried into each hamburger patty, melted American cheese, grilled onions, and include extra secret sauce.
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Prep Time 15 minutes
Cook Time 10 minutes
Total Time 25 minutes
Course Main Course
Cuisine American
Servings 2 Cheeseburgers
Calories 732 kcal


  • 1 lb. ground beef
  • salt and pepper to taste
  • 1/4 cup mustard
  • 4 slices American cheese
  • hamburger buns

Secret Sauce

  • 2 Tbsp. plus 2 tsp. mayonaise
  • 1 Tbsp. ketchup
  • 2 tsp. sweet pickle relish
  • 1/2 tsp. white vinegar
  • 1/2 tsp. sugar

Grilled Onions

  • 1 large yellow onion, finely chopped
  • 1 Tbsp. butter


  • 1 large tomato, sliced
  • lettuce
  • pickles


Secret Sauce

  • In a small bowl add mayonnaise, ketchup, sweet pickle relish, white vinegar, and sugar, Mix well to combine and set aside.

Grilled Onions

  • In a small to medium skillet over medium-high heat, add 1 Tbsp. butter and finely chopped onions. Stir occasionally until well browned.
  • Once onions start to sizzle and look dry, add 1 Tbsp. water and stir. Continue cooking until water evaporates and onions look dry again. Repeat this process 2-3 times until onions become soft and dark brown. Transfer to a small bowl and set aside.

Animal style cheeseburger

  • Divide your ground beef into four 2 oz. patties (a little larger than your bun) and keep them about 1/4 inch thick. Season both sides of the patties with salt and pepper to taste.
  • Place your beef patties in a large skillet on medium-high heat and cook until well browned and crusty on the first side.
  • Add 1 Tbsp. yellow mustard to the raw side of your patties and flip them over.
  • Continue to cook until burgers are fully cooked through
  • Add a slice of American cheese and let it melt, then top burgers with grilled onions.
  • While your hamburgers are cooking, spread butter on your hamburger buns and gill them in a large skillet until they are toasted.
  • While your hamburgers are cooking, spread butter on your hamburger buns and gill them in a large skillet until they are toasted.


Serving: 1CheeseburgersCalories: 732kcalCarbohydrates: 45.3gProtein: 61.3gFat: 34.5gSaturated Fat: 13.5gCholesterol: 185.5mgSodium: 1751mgPotassium: 965.4mgFiber: 3.8gSugar: 14.6gVitamin A: 27.9IUVitamin C: 22mgCalcium: 10.3mgIron: 39.8mg
Keyword Animal style, Copycat In-N-Out Cheeseburger, double-double, In-N-Out, In-N-Out cheeseburger
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