Which type of whiskey is produced from malted barley and must be aged for at least 3 years in Ireland?

The correct answer is that Irish Single Malt Whiskey is produced from malted barley and must be aged for a minimum of three years in Ireland. This type of whiskey is defined by its production process, which utilizes exclusively malted barley and is distilled at a single distillery. The requirement for aging in wooden casks for at least three years is crucial, as it contributes to the development of flavor and character, aligning with the regulations set forth for Irish whiskey.

In contrast, the other types listed are distinguished by their varying ingredients and production methods. Irish Single Grain Whiskey typically includes other grains alongside barley and is often produced in column stills, while Irish Pot Still Whiskey combines both malted and unmalted barley, providing a unique flavor profile. Irish Grain Whiskey focuses on grains other than barley and doesn’t have the specific aging and single-distillery requirements that characterize Irish Single Malt Whiskey. These differences highlight why Irish Single Malt Whiskey is specifically defined by its use of malted barley and aging requirements.