What is the primary flavor component in pesto?

Basil is the primary flavor component in pesto, which is a traditional Italian sauce originating from Genoa. It is made primarily by blending fresh basil leaves with other ingredients such as olive oil, garlic, pine nuts, and Parmesan cheese. The herb's aromatic and slightly sweet flavor is the defining characteristic of pesto, making it instantly recognizable in various dishes ranging from pasta to sandwiches. While garlic, pine nuts, and cheese contribute to the overall flavor profile, basil remains the dominant and most essential ingredient in achieving the classic taste of this sauce.