Finish it off with a dash of orange bitters.

You taught me the ingredients once-threedashes orange bitters; two dashes acid phosphate; half a jigger of whisky; half a jigger of Italian vermuth.

You take 15ml of that, a couple of dashes of orange bitters, and stir into the ice cubes until they've absorbed some of the flavour.

"With just a dash of orange bitters in it," another might add.