Shouldn't this version of Singapore Sling also be topped up with soda water as the three others (Baker's Formula, Raffle's Formula and formula sing Old Tom Gin) are?
A technical question. I poured them in the prescribed order, and even had your preferred ingrediencies at home;
1. Tia Maria Coffee Liqueur
2. De Kuyper White Crème de Cacao Liqueur
3. Baileys Original Irish Cream liqueur
But the layering is not as yours! (from the bottom)
Tia Maria
Crème de Cacao
Baileys
The ingrediencies had been in the freezer for about 1 hour an in the fridge for about 40 minutes when I poured the shot.