What You Need to Know
The high temperature initiates Maillard reactions between the amino acids and reducing sugars in garlic, generating pyrazines, thiazoles, and sulfur‑containing volatiles that give a complex roasted aroma. Simultaneously, allicin and other phenolics are partially degraded, while antimicrobial sulfur compounds are formed, reducing moisture and extending shelf‑life.
The Science
Primary Reaction
Maillard reaction between amino acids and reducing sugars