Ernest Hemingway was a hardened drinker who also suffered from haemochromatosis (a rare hereditary disease that can lead to diabetes) so avoided sugar...
I really wanted this one to work as I'm a fan of coconut water cocktails, but unfortunately, I really can't say I liked it. It's missing sweetness and complexity that even the Angostura bitters couldn't compensate for. I added ~5ml of 2:1 simple syrup and it made OK'ish..
Initially I did think it lacked a certain sweetness but after a few sips I found I enjoyed it as it was. I may have been a little enthusiastic with the bitters but then again I like the flavour of Angostura so didn’t mind!
Hmm. Yes, the amount of lime juice in your recipe is one that I didn't really consider. I went for the juice of one lime, so between 15 and 20ml. Maybe that's the difference! I saw a lot of variation with lime juice in different recipes, and I don't believe it's specified in the book. But it feels that it would be the juice of either a half or a whole lime!