Folks in California have a pretty fine food setup - they can grow avocado and citrus trees in their backyards, some kinda of winery is alway a day's drive away, and when you decide it's time for an In-N-Out burger, it's time for an In-N-Out burger.
And what are the rest of us to do? Why, make them at home, of course. To get the recipe just right, Serious Eat's writer Kenji Alt (of McDonald's French Fries at home fame) had four flash frozen burgers shipped from California to his home in NYC, busted out the scales, and got down to some serious reverse engineering.
Admittedly, I haven't tried the results yet, but with the detail and sheer reading-pleasure of Kenji's full walkthrough, you better believe its on my list of things to do this weekend.
Seriously worth your time...