transesterified edible beef tallow with a free fatty acid content of 0.27%. The tallow was heated to remove moisture under vacuum, then kept at 60°C. Transesterification was conducted using 6:1 molar ratio of methanol/tallow, 1% (by the weight of tallow) NaOH dissolved in the methanol and 60°C for about 30 min. After separation of glycerol, the ester layer was transesterified again using 0.2% NaOH and 20% methanol at 60°C for about 1 h. The mixture was washed with distilled water until the wash water was clear. The purified ester was heated again to 70°C under vacuum to remove residual moisture. The laboratory scale process yielded 400 g of tallow ester from 500 g of beef tallow.