Analytical methodologies based on GC and HPLC were developed for the separation and quantification of carnosic acid, ursolic acid, caffeic acid, p‐ coumaric acid, rosmarinic acid, apigenin, luteolin, quercetin, kaempferol, naringenin, and pinocembrin. These methods were used to characterize essential oils and extracts obtained by solvent (methanol) and by supercritical fluid (CO 2 ) extraction from stems and leaves of L ippia ( V erbenaceae family) aromatic plants ( L ippia alba , L ippia origanoides , L ippia micromera , L ippia americana , L ippia graveolens , and L ippia citriodora ). Supercritical CO 2 extraction isolated solely pinocembrin and narigenin from three L . origanoides chemotypes. Solvent extracts possessed a more varied composition that additionally included apigenin, quercetin, and luteolin. Solvent extraction afforded higher overall flavonoid yields from all species in comparison with supercritical CO 2 extraction. Pinocembrin was determined in L . origanoides extract at a concentration of 30 mg/g of plant material, which is more than ten times higher than the amount at which polyphenols are regularly found in aromatic plant extracts.