In-N-Out may have their secrets, but so do we! To learn our not-so-best-kept secret, you'll have to watch the video (we reveal it in the first 5 seconds, and it's also linked in the ingredients section of the page). Let's just say that one California burger chain keeps asking for OUR recipe, but we've kept the big wigs out of it and left the details below for your convenience. You’re welcome btw.