Balsamic Pork Tenderloin Recipe from addapinch.com Pinner said: I made this last night with a pork sirloin tip roast. A tenderloin seems too tender a cut to slow cook. I'll save that for the grill:) All but one family member LOVED it. I added 1T. brown sugar while it was cooking because the vinegar smelled strong and I knew my family wouldn't eat it if it was too sour. It was delicious and so easy!