Sweet Heat BBQ Sauce

1 1/4 cup Ketchup
1 cup light brown sugar
1/4 cup molasses
1/4 cup apple cider vinegar
1/4 cup water
2 tablespoons Worcestershire sauce
2 tablespoons Sweet Heat BBQ Rub
Salt and pepper to taste
1 tablespoon all-purpose flour

Place all of the ingredients, except for the flour in a saucepan, stir to combine and bring the sauce to a boil over medium high heat. Reduce the heat to medium low and cook, stirring occasionally until sauce has reduced by one-third, about 20 minutes. 

Gradually add the flour to the sauce, stirring continually to prevent lumps from forming.

Simmer the sauce for another 5 minutes and add a pinch of salt and pepper. Use immediately or let the sauce cool and refrigerate until ready to use.