Make the BBQ sauce. Combine all ingredients in a medium saucepan. Bring to a boil while whisking constantly. Reduce the heat to low, cover with a lid, and simmer for 25 minutes, stirring occasionally.
Cool. Remove the sauce from the heat and allow it to cool slightly before using.
Store. Transfer any unused BBQ sauce to a lidded jar and store in the fridge for up to 2 weeks.
