Created by dld512
A big part of the Big Mac's appeal is the tasty "secret" spread slathered onto both decks of the world's most popular double-decker hamburger. So what's so special about this sauce? It's basically just thousand island dressing, right? Pretty much. But this sauce has a bit more sweet pickle relish in it than a typical thousand island salad slather. Also, I found that this clone comes close to the original with the inclusion of French dressing. It's an important ingredient—ketchup just won't do it. That, along with a sweet-and-sour flavor combo from vinegar and sugar, makes this sauce go well on any of your home burger creations, whether they're Big Mac clones or not. My McDonald's special sauce copycat recipe is super easy, but if you don't feel like making it at home, try my Burger Special Sauce for a killer bottled version of McDonald's Big Mac Sauce.Source: Even More Top Secret Recipes by Todd Wilbur.
Combine all the ingredients in a small bowl.
Place the sauce in a covered container and refrigerate for several hours or overnight to allow the flavors to blend. Stir the sauce a couple times as it chills.
Makes about 3/4 cup