You should try this shit some time. Trust me. It's the best thing to ever come out of Texas.
I use it on almost anything. Mostly burgers/turkey burgers. It's good as dipping sauce for steaks, too. It's so good.
If you want you can order it from Amazon. They sell it cheaper than the Whataburger store.
It isn't cheap but you can buy bottles of Spicy Ketchup
I just spent some time trying to find some. Amazon is the only thing I've got.
Whataburger Spicy Ketchup - 3 pack - SHIPPING DIRECT FROM WHATABURGER - Whataburger Spicy Ketchup - (3 pack/20oz) https://www.amazon.com/dp/B00L99TURK/ref=cm_sw_r_cp_api_i_QzheFbAHQYP9F
Don’t bring me excuses!
Yeah you can, very disappointed people still subscribe to the mentality of being limited by outdated brick and mortar stores. https://www.amazon.com/Whataburger-Spicy-Ketchup-SHIPPING-WHATABURGER/dp/B00L99TURK/