Name: In and Out Sauce (Copycat)
Prep time: 6 min
Total time: 6 min
Yield: 10 servings
Cuisine: American

It is a Keeper Verified

February 12, 2026

This recipe is a perfect copycat of the famous sauce served with In-N-Out burgers. It’s quick and easy to make, and uses simple ingredients, like mayo and ketchup. This delicious sauce is the perfect topping for burgers and sandwiches, but can also be used as a salad dressing or a topping for animal style fries.

From the Cook

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In and Out Sauce (Copycat)

It is a Keeper Verified

Ingredients

WarningEggs and 3 other allergens identified

Instructions

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Instructions

Combine all ingredients together in a small bowl and whisk until combined.

Refrigerate for at least 30 minutes before serving.

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My Calorie Intake

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Tips & Tricks (5)

Precise Ingredient Ratio 🧮
Use a 2:1 ratio of mayonnaise to ketchup as the base to achieve the authentic In-N-Out sauce consistency and flavor profile.
Pickle Relish Secret 🥒
Drain the sweet pickle relish thoroughly to prevent excess liquid from making the sauce too runny, ensuring a perfect creamy texture.
Flavor Melding Technique 🕰️
Refrigerate the sauce for at least 30 minutes before serving to allow the flavors to fully combine and develop a more complex taste.
Vinegar Balance Trick 💡
Add white vinegar gradually and taste as you go to control the tanginess, preventing the sauce from becoming too acidic.
Storage Pro Tip 🧊
Store the sauce in an airtight container in the refrigerator for up to 5-7 days, giving you a quick condiment ready to elevate any burger or sandwich.

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About the Cook

It is a Keeper

Hi! I’m Christina… welcome to my kitchen! It’s so nice to meet you! I share tried and true recipes that anyone can make. I believe, if you can read, you can cook.