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In n Out Sauce (Copycat)

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Do you love In n Out Sauce? This copycat recipe makes a creamy, tangy hamburger sauce that tastes just like one at the restaurant! It’s also perfect as a dipping sauce for fries, sausage balls, sandwiches, and so much more.

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Looking down into a bowl of creamy fry sauce.

You don’t have to visit the west coast or southwestern U.S. to taste In N Out’s sauce. Why? Because with this recipe, you can make at home!

In-N-Out restaurant is known for their delicious fast food menu items. They made a solid fan base with their burgers and loaded Animal style fries.

Everyone knows that burgers taste the best served on a perfect hamburger bun, and piled high with condiments and toppings.

But what draws people into the fast food line is the In and Out sauce! Not only is it the best burger sauce, but it’s also a fantastic dipping sauce. It’s the perfect partner for fries and other dippable sides.

The great news is, it’s easy to make at home! Chances are good that once you make this copycat In N Out sauce recipe, you will never want anything else.

Plated burger and fries next to a small bowl of In n Out sauce.

Ingredient Notes and Substitutions

  • Mayonnaise – This creates a creamy and smooth consistency.

    Substitutes: You can use an equal amount of light mayo, sour cream, or plain Greek yogurt. However, the difference in flavor will be noticeable.

  • Sweet pickle relish – This adds a sweet and tangy flavor that balances the richness of mayo.

    Substitutes: If you don’t have any sweet relish, finely chop up a few bread and butter pickles instead. Or, use dill relish, but know that it will affect the flavor of your In and Out sauce.
Bowls of mayo, ketchup, relish, and vinegar for In and Out sauce recipe.

Kitchen Tools for Making In and Out Sauce

Want to make other homemade condiments?

Jazz up your next meal of ribs or Shake and Bake chicken with sweet and tangy 3 ingredient BBQ sauce.

Or, the next time you’re craving nachos, cover the chips with homemade Velveeta cheese sauce!

Small glass serving bowl filled with the best burger sauce!

Tips for Making In n Out Sauce

  1. Mix the ingredient with a whisk.
    Whisking will help you combine everything completely, which creates a creamier consistency.
  2. Taste, then adjust the ingredients if necessary.
    You can adjust the sweetness or tanginess of the hamburger sauce by using more sweet pickle relish or vinegar. You can even include extra flavor enhancers, like hot sauce, paprika, or Worcestershire sauce.
  3. Chill the sauce.
    I highly recommend covering the bowl with plastic wrap and refrigerating the sauce for at least 1 hour before serving. This allows time for the flavors to develop.
Pickle relish, ketchup, and mayonnaise in a small glass bowl.

Other Uses For Hamburger Sauce

  1. Dipping Sauce
    In and Out sauce for burgers also tastes fantastic as a dip for Bisquick sausage balls, French fries, onion rings, or raw veggies.

    The sweet and tangy flavors go well with fish and chicken tenderloin recipes, too!
  2. Sandwich Spread
    It’s super tasty as a spreadable condiment for sandwiches. Try it on our Italian sliders!
  3. Salad Dressing
    It works well as a dressing for a cobb salad, or use it instead of mayo in a cold pasta or potato salad.
Dipping a burger into hamburger sauce.

In n Out Sauce FAQ

How long will the sauce last in the refrigerator?

This will last in the fridge for up to 1 week if stored properly in an airtight container.

Can I freeze the sauce?

I don’t recommend freezing this sauce as this the texture will change after thawing. I recommend making a sauce that’s enough for just one week’s consumption.

Is In and Out sauce the same as thousand island dressing?

Although they look very similar, they aren’t identical. The hamburger sauce recipe includes vinegar, which gives it a tangier flavor. Also, Thousand island salad dressing is thicker.

Sandwich on a bun cut in half with French fries on a white plate.
In n Out sauce in a small glass bowl in front of a plated In and Out cheeseburger and fries.

In ‘n Out Sauce

Do you love In n Out Sauce? This copycat recipe makes a creamy, tangy In and Out hamburger sauce or dip for fries, sausage balls and more!
4.91 from 10 votes
Print Recipe Pin Recipe
Prep Time 3 mins
Total Time 3 mins
Course condiment, sauce
Cuisine American
Servings 4 servings (3/4 cup total)
Calories 216 kcal


  • medium bowl
  • wire whisk


  • ½ cup mayonnaise or light mayo
  • 3 tablespoons ketchup
  • 2 tablespoons sweet pickle relish or minced sweet pickles
  • ½ tablespoon distilled white vinegar
  • 1 teaspoon sugar


  • Measure all of the ingredients into a medium sized bowl. Stir the ingredients with a wire whisk until the sauce is smooth, creamy, and well combined.
  • For the best flavor, cover the bowl with plastic wrap and refrigerate the sauce for at least 1 hour before serving.
  • Refrigerate any leftover In and Out sauce in an airtight container, and use within 7 days.


  1. To lower the calories and fat, use light mayo instead of full fat mayo. This will cut approximately 100 calories per 3-tablespoon serving.


Serving: 1serving (about 3 tablespoons) | Calories: 216kcal | Carbohydrates: 7g | Protein: 0.4g | Fat: 21g | Saturated Fat: 3g | Polyunsaturated Fat: 13g | Monounsaturated Fat: 5g | Trans Fat: 0.1g | Cholesterol: 12mg | Sodium: 341mg | Potassium: 39mg | Fiber: 0.1g | Sugar: 6g | Vitamin A: 167IU | Vitamin C: 1mg | Calcium: 4mg | Iron: 0.2mg
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