Basil is an aromatic herb originally from India. Common sweet basil is green, with large, soft leaves. It is the star ingredient in Italian pesto, and iconic Italian dishes such as the caprese salad. It is also commonly used in Provençal dishes like soupe au pistou.
Thai basil is an herb that can refer to three different types of basil used in Thai cooking -- Queen of Siam, Holy Basil or Horapa, which is the most commonly used Thai basil in the United States. It has purple stems, small greenish purple leaves, and a licorice taste that is distinct from Italian sweet basil.
Thai basil adds a subtle anise flavor and perfume when plunged into hot soups (including Vietnamese Phở), stir-fried dishes or curries just before serving. Or it can be eaten fresh in salads, wrapped in a lettuce leaf with mint, or fried in spring rolls.
