Which of the following describes the preparation method for a nutty Irishman?

The preparation method for a Nutty Irishman is best described by stirring. This cocktail typically consists of Irish cream liqueur and hazelnut liqueur, which are ingredients that combine well when stirred rather than shaken or blended. Stirring allows the pours to meld together smoothly and maintain the creamy consistency of the Irish cream without introducing too much air or dilution.

In contrast, cocktails that require shaking are often those with citrus juices or ingredients that need significant mixing or aeration, while blending is reserved for drinks that typically require a consistent texture, like smoothies. Rolling, often used for specific cocktails, involves gently mixing ingredients without the vigorous motion of shaking, which is not the ideal method for the Nutty Irishman. Thus, stirring is the appropriate technique to achieve the desired balance and texture for this drink.