Since I am not the biggest fan of sours, I took inspiration from this, removed the lemon, and made a version with 1 Old Forester, 1 grapefruit juice, 3/4 Nonino, 3/4 Combier. This was actually quite tasty, but I might workshop different amaros - based on comments below, I think Averna is next on the list.

Meletti or Averna sounds preferable to the Amaro dell'Etna I used in this. I was, however, quite delighted with the flavors I got. Oh so moreish.

This was outstanding. We were looking for a lighter, more refreshing whiskey cocktail to beat the heat here in California and this was it. We did not have Meletti on hand but used Averna instead. This is just a beautiful balance of varied citrus flavours and richer notes from the bourbon and amaro. One of the best sour variations I've had in recent years; we'll be adding this to our permanent repertoire.

Made this with Averna and it was very nicely balanced. Enough bitterness from the grapefruit, and rich texture from the Amaro. Came out great.

A beautifully balanced and complex sour. I wonder why our good host could go no higher than four stars.