It only really looks nice for the first few seconds when you’ve got the separation between the tonic and the espresso. I used a single shot for the pic to get more contrast between the two. A double mixes pretty quickly.
Ice and tonic first means the ice doesn't immediately melt. If you do the espresso before the tonic it'd melt all the ice. I do tonic and ice first, dump the espresso then stir.
Was not expecting tonic first for some reason!