for your table jameson costco photo studio kirkland irish whiskey costco photo studio luck of the irish march is the month for irish whiskey by curtis adamson curtis adamson is spirits program ad you asked me five years ago grown in popularity among whiskey drink- what are the main differences between used and grain combinations to make costco connection costco features whiskeys in select irish whiskey must be aged at least signature" irish four years for added complexity and whiskey with malt and grain whiskeys grains and aging bourbon is made from at least 51% corn to be sweeter and have a heavier mouthfeel with rich aromas and flavors such as cara- both scotch and irish whiskey must be irish whiskey have similar aromas and fla- and irish whiskey can be lighter in style key must be distilled and aged in ireland guidelines in terms of the types of stills irish whiskey is typically a lighter keys are smooth and approachable; others are aged 10 years or more and have added complexity and pronounced flavors the cask requirements for irish whiskey allows producers to age their whiskey in casks previously used for other beverages impart different flavors many tasty cocktails with this special spirit may find a permanent addition to your spirits collection