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Make the famous In N Out Sauce at home without all of the added preservatives – it’s so good, there’s a reason why it’s so beloved! You only need 7 ingredients and 5 minutes to whip this creamy, savory sauce at home!
Watch the In N Out Sauce Recipe Video!
Table of Contents
Ingredient Tips
Refer to the recipe card for the full list of ingredients and measurements!
I’ve tested this multiple times to get it as close as possible to the infamous In N Out Sauce (including calling them multiple times, lol!) – here are my key tips and notes:
- ground mustard: this is essentially ground mustard seed (sometimes labeled powdered mustard). It’s very potent and only requires small amounts for this recipe. I recommend using this over regular yellow mustard as yellow mustard has other ingredients like vinegar and water that will throw off the ratio of the sauce.
- ketchup: I tried multiple brands and Heinz worked the best for this! You can use another brand if you prefer but I recommend using Heinz.
- mayo: I tried multiple brands (including my beloved Kewpie) and I found Best Foods/Hellman’s to have the best results.
- sugar + sweet relish: In N Out sauce is balanced in being both savory and sweet – that’s why you’ll see two sources of sugar in this recipe. If you prefer less sweet sauces, you can reduce the sugar or use a non-sweet relish.
The best part of my recipe is that there are no preservatives or additives! That’s why I love making homemade sauces, like Ranch, Raising Cane’s Sauce, Chick Fil A Sauce, Tonkatsu Sauce, BBQ sauce, Sweet and Sour Sauce, Thai Sweet Chili Sauce, and more!
How to Make In N Out Sauce
1. Mix Vinegar, Sugar, Ground Mustard, and Salt
In a small mixing bowl, mix together distilled white vinegar, sugar, and ground mustard. I recommend doing this first, as these ingredients are the most susceptible to clumping. This helps esure they are properly dispersed throughout the mayo when mixing.
2. Add the Remaining Ingredients
To the same bowl, add the remaining ingredients (mayonnaise, ketchup, and relish). Mix together and let sit for at least 10 minutes to allow the flavors to meld.
Serve it with your favorite Smash Burgers or even as a dip for Fried Chicken, Chicken Tenders, or Air Fryer Chicken Tenders! I also love it for wings, like Air Fryer Chicken Wings, Baked Chicken Wings, or Grilled Chicken Wings!
PRO TIPS
CJ’s Expert Tips + Storage
- You’ll notice that I recommend whisking the sugar, ground mustard and salt into the vinegear until dissolved first – this ensures they are properly dispersed throughout the mayonnaise when mixing. These are the most suseptible to clumping, so I like to dissolve them into the vinegar first.
- Sauces always taste better as the flavors meld together! Let this sit for at least 10 minutes but as long as possible (covered, in the refrigerator) for the best results.
- You can store this in an airtight container in the refrigerator for up to 1 week. Do not leave it outside in room temperature – it will spoil!
- Make sure to use a clean utensil every time to avoid contamination.
If you tried this In N Out Sauce Recipe or any other recipe on my website, please leave a 🌟 star rating and let me know how it went in the comments below!
In N Out Sauce (Perfect Copycat)
Ingredients
- 2 tbsp distilled white vinegar
- 1/2 tsp sugar
- ¼ tsp ground mustard
- ½ tsp kosher salt
- 1 cup mayonnaise, use Best Foods/Hellmann’s Mayonnaise
- 1/3 cup ketchup, Heinz is best
- 2 tbsp sweet pickle relish
Instructions
- In a small mixing bowl, mix together distilled white vinegar, sugar, and ground mustard. Mix well until the sugar, mustard, and salt have dissolved.
- To the same bowl, add mayonnaise, ketchup, and relish. Mix together and let sit for 10 minutes to allow the flavors to meld. Store in the fridge for up to 1 week.
Notes
- You’ll notice that I recommend whisking the sugar, ground mustard and salt into the vinegear until dissolved first – this ensures they are properly dispersed throughout the mayonnaise when mixing. These are the most suseptible to clumping, so I like to dissolve them into the vinegar first.
- Sauces always taste better as the flavors meld together! Let this sit for at least 10 minutes but as long as possible (covered, in the refrigerator) for the best results.
- You can store this in an airtight container in the refrigerator for up to 1 week. Do not leave it outside in room temperature – it will spoil!
- Make sure to use a clean utensil every time to avoid contamination.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
