Jack: I made the mustard sauce from your recipe this weekend, even took my first dabble in mason jar canning to boot. It is a very good sauce, even my wife likes it, and she is no fan of mustard. I did find it to be a little milder than most mustard based bbq sauces that I have tried. Any suggestion for kicking up the heat? Would you just go stronger on the cayenne, or is there another ingredient that you would add to make it a little spicier? Thanks for the recipe.