Gather all of the ingredients - garlic powder, Tony's Creole Seasoning, black pepper, ketchup, mayonnaise, and Worcestershire sauce - and add them to a small mixing bowl.
½ cup mayonnaise, ¼ cup ketchup, ¼ teaspoon Worcestershire sauce, ½ teaspoon black pepper, ½ teaspoon garlic powder, ¼ teaspoon Tony Chachere's Creole Seasoning
Mix until well combined, then transfer to an airtight container.
Let the sauce sit in the fridge for at least 6 hours before serving. (Leaving it overnight for 12-24 hours will give you the best flavor.) Enjoy!
Notes
Tips to Make the Best Sauce
Be sure to let the sauce sit for at LEAST 6 hours. If you taste it immediately, it will just taste like ketchup.