Pungent and grassy, this perennial plant belongs to the mint family and imparts a unique combination of flavors such as basil, spearmint, cinnamon, and subtle anise. Often used as a garnish or muddling component in cocktails, fresh shiso can sometimes be inconvenient to source, inconsistent in flavor, and has a limited shelf life. In bitters form, this distinct flavor component knows none of those limitations. While shelf stable, refrigeration is recommended after opening to ensure optimal potency.