A teaspoon of vanilla essence or around a tablespoon of darkish rum or maybe a espresso flavoured liqueur such as Kalua or Tia Maria (optional but good) The moment it receives to some rolling boil, stir consistently and cook for 3 whole minutes. This is vital to have that Toffee https://martinhkoot.tinyblogging.com/little-known-facts-about-philly-cheesesteak-recipe-82060528