Fatburger

Southern California—the birthplace of famous hamburgers from McDonalds, Carls Jr. and In-n-Out Burger—is home to another thriving burger chain that opened its first store in 1952. Lovie Yancey thought up the perfect name for the 1/3 pound burgers she sold at her Los Angeles burger joint: Fatburger. Now with over 41 units in California, Nevada, and moving into Washington and Arizona, Fatburger has become the food critic's favorite, winning "best burger in town" honors with regularity. 

The seasoned salt used on the beef patty is the secret here. (Hint: It's just Lawry's). And there's no ketchup on the original version, just mayo, mustard, and relish. You can follow my Fatburger recipe below for an exact copy, or go to town with any condiment combination you like.

Source: Even More Top Secret Recipes by Todd Wilbur.