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Next Best Picture's Philip Bagnall suggested the film is "engineered to keep the kids busy around 4pm on Christmas Day while mum and dad sip their third Irish coffee in peace".

Ladle into a mug, teacup, or Irish coffee mug, and add sloe gin.

Ehmann found everything she needed to pull it off: “Irish coffees are easy because we have coffee anyway, and we are going to bring in whipped cream.”

You will need a stemmed Irish coffee mug or another heatproof mug, and a kitchen torch or long matches.

But the popularity of espresso martinis, Irish coffees and Red Bull-with-vodka cocktails makes it clear that Americans don’t mind catching two buzzes simultaneously.