I just re-tried and flamed for me using Giffard Menthe Pastille (24% alc./vol.), Wray & Nephew overproof rum (63%) and Galliano Espresso/Ristretto (30%). You need to move the glass to near horizontal when holding the flame to the cocktail to ignite. And I agree, a good digestif, better than the previous 3-out-of-4 rating so I have promoted it to a 4.