I’ve always believed the secret to an In-N-Out burger is the sauce, so I finally tried making it at home. It’s creamy, tangy, and just the right amount of sweet—exactly what ties the whole burger together.
I love how a handful of simple pantry ingredients can create something this iconic. Now, I can spread it on burgers, dip fries in it, or even drizzle it on sandwiches when I want that same drive-thru flavor.
It’s such a small thing, but it makes homemade burgers taste like something straight off the In-N-Out menu.
Why You’ll Love This Recipe
This In-N-Out sauce copycat is tangy, creamy, and versatile. You’ll love how easy it is to whip up in less than 10 minutes with basic ingredients like mayo, ketchup, and relish.
It tastes just like the real thing but can be customized — make it a little sweeter, spicier, or tangier to suit your family’s preferences.
It’s not just for burgers either: this sauce is amazing as a dip for fries, onion rings, or even chicken tenders. Once you try it, you’ll always want a jar in your fridge.
What You’ll Need
- ½ cup mayonnaise
- 3 tablespoons ketchup
- 2 tablespoons sweet pickle relish
- 1 teaspoon white vinegar
- 1 teaspoon sugar
- ½ teaspoon onion powder
- ½ teaspoon paprika
Pro Tips
- Use full-fat mayo for the creamiest texture and richest flavor.
- Let the sauce chill for at least 30 minutes before serving to let flavors meld.
- Adjust sweetness and tang by adding more sugar or vinegar to taste.
- For extra flavor, stir in a dash of garlic powder or hot sauce.
- Double the recipe — it disappears fast, especially when fries are around.
Tools Required
- Small mixing bowl
- Whisk or spoon
- Measuring cups and spoons
- Airtight container for storage
Substitutions & Variations
- Swap sweet pickle relish for dill relish if you like more tang.
- Use apple cider vinegar instead of white vinegar for a slightly fruity note.
- Add a teaspoon of mustard for a sharper flavor.
- Stir in hot sauce or sriracha for a spicy version.
- Try smoked paprika instead of regular for deeper flavor.
Make-Ahead Tips
This sauce is perfect for making ahead. It actually tastes better after a few hours in the fridge because the flavors have time to blend.
You can make it up to 5 days in advance and store it in an airtight container. It’s a great option for meal prep, cookouts, or party spreads.
Instructions
1. Combine ingredients
In a small bowl, mix together mayonnaise, ketchup, relish, vinegar, sugar, onion powder, and paprika.
2. Whisk until smooth
Whisk or stir until the sauce is creamy and well combined.
3. Chill
Cover and refrigerate for at least 30 minutes before serving to let flavors develop.
4. Serve
Use as a spread for burgers, a dip for fries, or a topping for sandwiches.
Serving Suggestions
This sauce is best known as the star of In-N-Out burgers, but its uses don’t stop there. Spread it on sandwiches and wraps for an extra burst of flavor.
Serve it as a dip for French fries, sweet potato fries, or onion rings. Use it as a sauce for grilled chicken, or drizzle it over roasted vegetables for a fun twist. For family cookouts, keep a jar of it on the table — it always disappears first.
Leftovers & Storage
Store leftover sauce in an airtight container in the refrigerator for up to 5 days.
Stir before serving if it separates slightly. This sauce doesn’t freeze well, so make only what you’ll use in a week.
Nutrition & Benefits
While this sauce is definitely indulgent, it’s made with simple, recognizable ingredients. Mayonnaise provides creaminess and richness, while relish adds a touch of sweetness and crunch.
Making it at home means no preservatives and full control over the flavor. Plus, since it’s so flavorful, a little goes a long way, adding excitement to meals without needing a huge serving.
Recipe FAQ
1. What is In-N-Out sauce made of?
It’s a mix of mayo, ketchup, relish, vinegar, sugar, and spices — similar to Thousand Island dressing.
2. How long does it last in the fridge?
About 5 days in an airtight container.
3. Can I make this sauce healthier?
Yes, use light mayo or Greek yogurt in place of regular mayonnaise.
4. Is this sauce the same as Thousand Island?
It’s similar but not identical — In-N-Out’s version is creamier and tangier.
5. Can I use this sauce for things other than burgers?
Absolutely! It’s great on fries, sandwiches, wraps, and even as a dip for veggies.
A Sauce Worth Sharing
This In-N-Out sauce copycat is creamy, tangy, and versatile — exactly what makes those burgers so irresistible.
With just a handful of ingredients, you can make it fresh at home in minutes and enjoy it on everything from burgers to fries. It’s quick, easy, and guaranteed to be a family favorite.
So the next time you’re craving a little taste of In-N-Out, skip the drive-thru and make this sauce in your own kitchen.
