Ketchup bumped Jack's signature special sauce from the burger in 1999, but due to guests' demands, special sauce is still available on request.

Here is the recipe for Jack In The Box's secret sauce. While the portions were not provided, the following ingredients are here for your experimenting pleasure. Bon Appetit!

• water
• soybean oil
• tomato paste
• vinegar
• high fructose corn syrup
• mustard
• onion (dehyrated)
• egg yolk
• corn syrup salt
• Worcestershire Sauce
• A-1 steak sauce
• xanthan gum
• Tabasco sauce
• sodium benzoate and potassium sorbate (added as preservatives)
• oleoresin paprika