A teaspoon of vanilla essence or as much as a tablespoon of darkish rum or even a coffee flavoured liqueur like Kalua or Tia Maria (optional but great) Bestselling cookbook author and previous math and science Trainer, I'm obsessed with generating lovely, foolproof recipes. Edited so as to add: So https://echobookmarks.com/story20491236/the-smart-trick-of-philly-cheesesteak-recipe-that-no-one-is-discussing