If you're new to using XO Cafe, Bacardi's Espresso Martini Cocktail recipe is a delicious place to start. Mix one up and see what you think of this liqueur that so many people are obsessing over.

But none of these were really met with the odd, singular devotion that XO Cafe commanded. Now this key Espresso Martini ingredient is back, albeit as a one-time limited release that will only be ...