Had an Autumn themed party and started the evening with a Damson Gin variation of this offering a lovely pink clolour. Dialled back the amount of damson gin slightly (50 ml rather than 60 ml) and used shop bought soda water. Found out that the addition of the soda really increases the foamy top. Be prepared for that.

This is a super cocktail. We started by doubling the quantities here and then adjusted. With 60 ml gin / 15 ml lime / 22.5 St Germain. This proved a tad sharp. However, 60 ml gin / 15 ml lime / 30 ml St Germain proved to be the perfect balance.
Edit: Actually I see he balance I have suggested here exists in another entry on this site as a French Gimlet …here https://www.diffordsguide.com/cocktails/recipe/10679/french-gimlet?srsltid=AfmBOoqnCD978vqwUW-isJ3kHW2F9y1mma6MjfMgJBbmnNF9AYggXCcg

The frangelico is very dominant in this, overly dominant in my opinion. I would be minded to suggest doing this with half the quantity of frangelico.