My favorite cocktails aren't necessarily the ones that taste the best (though this is extremely tasty), but the ones that evoke a memory—a moment in time or a place. This little piece of alchemy took me right back to childhood mornings, tasting (I swear) exactly like the Florida grapefruit my mother used to section for breakfast. Not a drop of grapefruit in the recipe, yet it landed squarely on that memory. If I were feeling fussy, I'd ask for a skosh more bitterness or acidity to make it jump up a register. I'm not, though—I'm just enjoying a wonderfully nostalgic moment with a very pleasant cocktail.

We very much prefer commenter Hyland's equal parts recipe offered in the comments section under the Paper Plane. As others have commented, this is too sweet.

Certainly not really reminiscent of a Paper Plane but it's a nice cocktail nonetheless, albeit on the sweeter side. The elderflower is front and center but the Nonino does a pretty good job of dialing it down. If I would remake it I'd probably use slightly less elderflower liqueur just to let the gin and Nonino speak a bit louder.

Based on the comments before me, I modified today's example to be:
- 40 ml gin (Beefeater)
- 20 ml elderflower liqueur
- 20 ml Amaro Nonino
and I think this is the direction in which to continue.
The next iteration would be:
- 45 ml gin
- 15 ml elderflower liqueur
- 20 ml Amaro Nonino

Also, given the total volume, a Nick&Nora glass would work well.

Far, far too sweet for me. I created two cocktails with the same Amaro Nonino, and St-Germain, and doubled the gin, and split it between two cocktails.

Delicious cocktail, although I find it is a bit farfetched to see it as "Paper Plane" variant. IMHO it needs a bit balancing as it is on the sweet side.