Step #1 mix ketchup brown sugar lemon juice zest molasses worcestershire sauce liquid smoke mustard onion powder & pepper in a nonreactive saucepan & whisk to mix let the sauce slowly come to a simmer over med-heat/flame & let simmer until thick & flavorful 8 to 10 mins.
Step #2 if not serving the sauce as soon as possible let cool to about room temp transfer to air tight jars & refridgerate until serving.
Enjoy the Steven Raichlen's Nashville Sweet Barbecue Sauce recipe