TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The aromatic-lean component is obtained from a combination of gasification and Fischer-Tropsch synthesis. The catalytic hydroprocessing conditions result in both hydrotreating and hydrocracking reactions. The fractionation separates the hydroprocessed aviation biofuel fraction from lower boiling hydrocarbons and higher boiling hydrocarbons present in the hydroprocessed product (where the lower boiling hydrocarbons comprise 4C-1 hydrocarbons). The method further involves generating, from at least a portion of the 4C-1 hydrocarbons, at least a portion of the hydrogen for contacting with the aromatic-rich biomass derived component and the aromatic-lean component; catalytically reforming at least the portion of the 4C-1 hydrocarbons in the presence of steam to generate at least the portion of the hydrogen for contacting with the aromatic-rich biomass derived component and the aromatic-lean component; and blending the hydroprocessed aviation biofuel fraction with a petroleum derived aviation fuel (1-99 wt.%). Preferred Composition: In the composition, the hydroprocessed aviation biofuel fraction comprises total organic oxygen (less than 500 part per million (ppm)); hydrocarbons (at least 99.5 wt.%); and aromatic hydrocarbons (at least 3% by volume). Preferred Components: The aromatic-lean component comprises olefinic hydrocarbons and oxygenated compounds. The aromatic-lean component is derived from biomass and the aromatic-rich component is derived from either biomass or tall oil. The aromatic-lean component is preferably derived from a biomass selected from hardwood, softwood, hardwood bark, softwood bark, corn fiber, corn stover, sugar cane bagasse, switchgrass, miscanthus, algae, waste paper, construction waste, demolition waste, and/or municipal waste. The aromatic-rich biomass derived component is obtained from pyrolysis. The aromatic-rich biomass derived component comprises tall oil rosin acids or eucalyptols (preferably crude tall oil or depitched tall oil). The aromatic-rich biomass derived component comprises oxygen (10-50 wt.%). The hydroprocessed biofuel is a hydroprocessed aviation biofuel. EXAMPLE - No suitable example given.