NOVELTY - Producing (I) fuel blend comprises: (a) providing a bio-based feedstock (112); (b) contacting the bio-based feedstock with a solvent in a hydrolysis reaction (114) to form an intermediate stream comprising carbohydrates (116); (c) contacting the intermediate stream with an aqueous phase reforming (APR) catalyst to form many oxygenated intermediates, where a first portion of the oxygenated intermediates are recycled to form the solvent; and (d) processing at least a second portion of the oxygenated intermediates to form a fuel blend.    USE - The method is useful for producing fuel blend, where the fuel blend includes diesel fuel, jet fuel (both preferred), additive or gasoline fuel (all claimed).    ADVANTAGE - The method: allows the greater percentage of the bio-based feedstock to be converted into higher hydrocarbons by minimizing the formation of unwanted by-products, thus providing a relative liquid fuel yield of at least 70%: and recycles the oxygenated intermediates produced in the APR reaction to form the in situ generated solvent, which can be used in the bio-based feedstock digestion process, hence saving costs and increasing the amount of carbohydrates extracted from the bio-based feedstock: and controls the degradation of carbohydrate in the APR process and allows to conduct the hydrogenation reaction along with the APR reaction at 175-275 degrees C, thus avoiding a separate hydrogenation reaction and increasing the fuel forming potential of the bio-based feedstock.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) producing (II) fuel blend comprising: steps (a)-(b) as above per se; contacting at least a portion of the intermediate stream with a hydrogenolysis catalyst in the presence of first hydrogen source to form at least some hydrogenolysis reaction products; contacting at least a portion of the intermediate stream with a hydrogenation catalyst in the presence of second hydrogen source to form at least some hydrogenation reaction products; contacting at least a portion of the intermediate stream with an APR catalyst to form an APR reaction product, where at least a portion of the hydrogenolysis reaction products, hydrogenation reaction products and APR reaction products are combined to form many oxygenated intermediates, and the first portion of the oxygenated intermediates are recycled to form the solvent; and step (d) as above per se; and    (2) a system comprising: a hydrolysis reactor operating under hydrolysis conditions for receiving the bio-based feedstock and solvent, and discharging an intermediate stream comprising a carbohydrate; an APR reactor comprising an APR catalyst for receiving the intermediate stream and discharging an oxygenated intermediate stream, where a first portion of the oxygenated intermediate stream is recycled to the hydrolysis reactor as the solvent; and a fuel processing reactor for receiving a second portion of the oxygenated intermediate stream and discharging a fuel blend.    DESCRIPTION OF DRAWING(S) - The figure shows block flow diagram of higher hydrocarbon production process.    Bio-based feedstock (112)    Hydrolysis reaction (114)    Intermediate stream comprising carbohydrates (116)    Recycle stream (118)    aqueous phase reforming reaction (122)