Tried this tonight, but as I recently bought a bottle of Ferrand Dry Curacao used it in place of my Cointreau. As suggested by Werd Bmocsil below, I used a drop of 20% saline as I am not a fan of salted rims. Excellent cocktail, not too sour, not too sweet. I wonder though if I missed out a bit on the orange citrus using the Dry Curacao. This was a very "smooth" cocktail not aggressively sour. I think though I will try next time with out the saline to see if that gives this otherwise excellent cocktail just a bit more punch as well as using Cointreau to see if that ups the orange component.

Have you tried this with your suggested ratios? While I very much enjoyed Difford's Guide's recipe, after drinking this cocktail for the first time, your idea sounds very promising.

Have you tried this again using Discerning Drinker Ruf's suggested ratios? I drank this tonight, and as it was the first time, I used the "official" Difford's Guide recipe. However, I too am thinking the altered ratios may indeed be better. I will try again and try to remember (no easy task; another birthday coming up!) and report back!

Excellent drink. Notwithstanding some comments that the Green Chartreuse may not be needed, I would argue that while subtle at only 5ml, it adds an herbal element essential to help balance the Limoncello which otherwise might overpower this cocktail.