In a medium saucepan, combine the ketchup, molasses, Worcestershire sauce, apple cider vinegar, dark brown sugar, paprika, garlic powder, onion powder, dry mustard, black pepper, and cayenne pepper.
Bring the mixture to a boil over medium-high heat, stirring occasionally.
Reduce the heat to low and simmer for 10 minutes, stirring occasionally.
Remove the sauce from the heat and let it cool to room temperature.
Store in an airtight container in the refrigerator for up to two weeks.
Interesting Facts
K.C. Bar-B-Q Sauce originated in Kansas City, Missouri, in the early 1900s.
The sauce is often used to make Kansas City-style barbecue.
K.C. Bar-B-Q Sauce is sometimes referred to as “red sauce” or “red-eye sauce”.