Improved correlation between sensory and instrumental measurement of peanut butter texture

Two commercial peanut butters and 3 laboratory-prepared peanut butters containing 0.5, 1.5 and 2.5% stabilizer were evaluated by sensory and instrumental texture profile analysis (TPA) using an Instron. A 2X3 factorial design consisting of crosshead speeds of 5 and 50 mm/min, and amount and type of fluid added was used. A descriptive panel (n = 11) was used to evaluate 14 sensory TPA attributes. Twelve sensory TPA attributes, compared with only 2 found by other researchers, were highly correlated (greater than or equal to 0.88) with I or more instrumental TPA parameters. Prediction models (R greater than or equal to 0.71) developed successfully predicted 12 sensory texture attributes from instrumental TPA results. Eleven models, excluding surface roughness, were successfully verified with 0.74 to 7.21% error.