I am having the exact opposite problem; every time I try to make the pressurized ketchup it turns into this nasty burnt mess. I have followed the recipe to a T, but something is not working with the timing with the pressure cooker. A wonderful caramelized smell comes out for the 1st 10 minutes or so in the pressure cooker and then it turns into this horrible burnt tomato smell. When I open the pressure cooker it is this rancid, acidic, burnt, tomato crisp / paste. Not sure what is happening here. This is the first recipe I have tried so far that hasn't been working out. Any ideas?