In my opinion, Sweet Baby Ray makes the best commercial barbecue sauce. This is a good copycat recipe for their original.
1 1/4 cups ketchup
1 cup dark brown sugar
1/4 cup molasses
1/4 cup pineapple juice
1/4 cup water
1 tablespoon hickory liquid smoke
2 1/2 teaspoons ground mustard
2 teaspoons smoked paprika
1/2 teaspoon garlic powder
1 pinch cayenne pepper
1 1.2 teaspoons kosher salt
1 teaspoon black pepper
1 tablespoon cornstarch (optional)
1/8 cup cold water (optional)
Whisk together all ingredients except cornstarch and 1/8 cup cold water in a medium pot over medium heat. Bring to a boil.
Reduce heat and simmer for 5 minutes until sugar has dissolved.
For a thicker sauce, combine the cornstarch and cold water then mix well to create a slurry. Add slurry to the sauce to thicken.
Simmer for 10 to 15 minutes or until desired thickness is achieved.
Find it online: https://simplygreatrecipes.com/sweet-baby-rays-barbecue-sauce/