To the bottle, add espresso powder, Kahlúa and water. Cap bottle, shake and store in freezer until well-chilled, at least 4 hours. To serve, set bottle in an ice bucket or pour directly from ...

He's also a cocktail expert, as evidenced by his most recent cookbook, Freezer Door Cocktails. Using his experience and know-how he cracked the code to the best espresso martini. His top tip?

Adjust brine amount to taste. Cap bottle, shake and store in freezer until well-chilled, at least 4 hours. To serve, set the bottle in an ice bucket and offer cocktail glasses and green olives.