If you love the flavor of the burgers from the iconic West Coast chain, this easy In-N-Out sauce recipe is about to become your new favorite condiment! Creamy, tangy, and slightly sweet, this homemade burger sauce will make you feel like you’re eating at the restaurant.

The best part? You can make this copycat sauce in just minutes using simple pantry ingredients.

In my opinion, the sauce can either make or break a burger. And I’m a big fan of the sauce at In-n-Out. No ketchup and mustard for me, give me a creamy, tangy sauce and I’m happy. Add a bit of crunch from pickles, and it’s even better!

My daughter actually brought this recipe home from a friend’s house, and I’d say she makes it at least twice a month to eat with potatoes. Once the rest of us tried it, it became a staple at our house!

Whether you’re building burgers at home, dipping fries, or making sandwiches, this sauce adds the perfect fast-food flavor to any meal.

What Is In N Out Sauce?

The famous In-N-Out burger spread is similar to a Thousand Island dressing, but less sweet and not quite as thick. It combines creamy mayonnaise, ketchup, sweet relish, vinegar, and sugar for a tangy, savory flavor that pairs perfectly with burgers and fries. It’s an easy recipe you’ll make over and over again!

Why You’ll Love This In-N-Out Sauce Recipe

• Quick and easy to make using ingredients you probably already have on hand
• Restaurant flavor at a fraction of the cost
• Perfect for burgers, fries, onion rings, and sandwiches
• Ready in 5 minutes
• Makes a tasty addition to any cookout or backyard BBQ

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How to Make In-N-Out Sauce

1. Combine the mayo, ketchup, sweet relish, vinegar, and sugar in a bowl. Stir until thoroughly blended.
   
2. Either serve immediately, or chill for 30 minutes to let the flavors meld together.

VARIATIONS:

• Use ½ teaspoon yellow mustard in place of or in addition to the vinegar
• Add a splash of Worcestershire sauce
• For a smoky flavor, add a large pinch of smoked paprika
• Add a dash of black pepper
• For a spicy kick, add sriracha sauce or red pepper flakes – my daughter’s favorite!
• You can use finely chopped dill pickles or dill pickle relish, but the sauce will not have the same sweet, tangy flavor.

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What to Serve With In-N-Out Sauce

This copycat burger sauce is incredibly versatile. Here are a few things we like to serve it with:

• Lipton Onion Soup Burgers
• As a dipping sauce for Baked French Fries
• Pigs in a Blanket
• Bacon Cheeseburger Salad
• Ranch Burgers
• Cheeseburger Pie
• Roastes Sliced Potatoes
• Onion rings

Try this copycat In-N-Out burger sauce on toasted burger buns with a grilled hamburger patty, lettuce, tomato, grilled onions, and a melted slice of American cheese, and I bet you’ll like it even more than the real thing!