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In And Out Sauce Recipe

In And Out Sauce Recipe (Better Than Drive-Thru!)

A creamy, tangy, slightly sweet copycat In-N-Out style burger sauce made with mayonnaise, ketchup, relish, and simple pantry spices. Perfect for burgers, fries, sandwiches, and more.
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Prep Time 5 minutes
Total Time 35 minutes
Course Condiment, Sauce
Cuisine American
Servings 4 burgers
Calories 90 kcal

Ingredients
  

  • 1/2 cup mayonnaise full-fat, good quality
  • 3 tablespoons ketchup regular, not low-sugar
  • 2 tablespoons sweet pickle relish
  • 1 tablespoon yellow onion finely minced (or 1 teaspoon onion powder)
  • 1 teaspoon white vinegar or apple cider vinegar
  • 1 teaspoon yellow mustard
  • 1/2 teaspoon sugar
  • 1/4 teaspoon paprika
  • 1/4 teaspoon fine sea salt plus more to taste
  • 1/8 teaspoon black pepper freshly ground if possible

Instructions
 

  • In a medium bowl, add the mayonnaise, ketchup, and sweet pickle relish. Whisk or stir until the mixture looks smooth and uniform in color with no streaks.
    1/2 cup mayonnaise, 3 tablespoons ketchup, 2 tablespoons sweet pickle relish
  • Stir in the minced onion (or onion powder), mustard, vinegar, sugar, paprika, salt, and black pepper. Mix well, scraping the sides and bottom of the bowl so everything is fully combined.
    1 tablespoon yellow onion, 1 teaspoon white vinegar, 1 teaspoon yellow mustard, 1/2 teaspoon sugar, 1/4 teaspoon paprika, 1/4 teaspoon fine sea salt, 1/8 teaspoon black pepper
  • Taste the sauce and adjust to your liking. For more sweetness, add a pinch of sugar or a little extra ketchup. For more tang, add a few drops of vinegar at a time, stirring and tasting as you go.
  • Cover the bowl with plastic wrap or transfer the sauce to a jar with a lid. Chill in the refrigerator for at least 30 minutes, ideally 1–2 hours, to let the flavors meld and the onion mellow.
  • Stir the sauce before serving. Use on burgers, sliders, sandwiches, wraps, or as a dip for fries, tater tots, onion rings, and veggies.
  • If the sauce becomes too thick after chilling, thin it with 1–2 teaspoons of water, milk, or pickle juice, stirring until smooth and creamy.

Notes

Yield: about 3/4 cup sauce, enough for 4–6 burgers depending on how much you use. For an “animal style” twist, add finely minced grilled or caramelized onions and a pinch more mustard. Store in an airtight container in the refrigerator for up to 5–7 days; do not freeze. Stir well if any separation occurs.

Nutrition

Calories: 90kcal
Keyword Burger Sauce, copycat In-N-Out spread, fast food sauce copycat, fry sauce, In N Out sauce
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