Development and Optimization of Cultured Goat Cream Butter

摘要

A central composite design 2~2+ star based on response surface methodology was used for development and optimization of a cultured goat cream butter formulation(cultured).The goat milk cream was inoculated with freeze-dried mesophilic aromatic lactic cultures and showed an increase in acidity and a decrease in lactose content when the concentration of lactic cultures was increased.An optimized temperature of 28deg C was chosen for fast acid production in the goat milk cream.The lactic culture concentration significantly affected flavor,sensory texture,and overall quality,but the fermentation time did not produce significant changes in sensory texture and overall quality.The optimal values of the fermentation process were an inoculum dosage of 8.8 U/100 L and a fermentation time of 7 h at 28 deg C.This cultured formulation achieved optimal sensory quality in the attributes appearance,flavor,texture,and overall quality.At refrigerator temperature(4 deg C)the cultured formulation behaved as a solid and laced spreadability,whereas it had ideal spreadability at 15 deg C when the solid fat content(SFC)was around 18.0%.At room temperature(18-25 deg C)the SFC was between 11 and 8%,respectively.