I did buy the Heinz one carb ketchup, but I have not tried it yet. Have you considered trying the Carb Options BBQ sauces? They taste great and although I have not grilled with them yet, the bottle gives instructions, so I am guessing it would work. Walden Farms BBQ is not anywhere near as good, or thick. Let me know how it goes, if I cook with it any time soon I will post back for you.