Method

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  Step 1

  To completely cool the martini cocktail glass or coupe glass, place it in the freezer or fill with ice water.

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  Step 2

  In a cocktail shaker, blend the Irish cream liqueur, vodka, cold espresso and chocolate syrup (if using).

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  Step 3

  Fill the shaker with ice and shake rapidly for 15-20 seconds, or until the outside is totally frosted, ensuring the drink is ideally frothy.

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  Step 4

  Discard the ice from the cold glass and fine pour the creamy liquid into the prepared glass. Garnish with chocolate shavings and serve immediately.