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Unlock the secret to the iconic In-N-Out burger experience with this foolproof copycat sauce recipe. Elevate your homemade burgers to legendary status with just a few simple ingredients!
In a small bowl or medium bowl, combine all of the ingredients until well blended. The sauce will have a better flavor if you let it sit in the fridge overnight, otherwise you can serve it right away.
If you don't like the pieces of pickle and onion in your sauce, simply run it through the blender or food processor to make it smoother.
To serve on a burger, spread it on the buns before topping your burger, otherwise drizzle it on heavily if you like it a lot!