The Baby Guinness is a popular boozy treat around Christmastime , and fans of the drink have now discovered that a nostalgic product is the perfect one-bottle alternative . A Baby Guinness is a great little drink for the festive season, as one of the main ingredients is Baileys, which is commonly seen at this time of year, mostly due to how wrong it feels to down the Irish cream liqueur in the middle of summer. The cocktail is drunk in shot form and comprises coffee liqueur - such as Kahlua or