油莎豆油基类可可脂在巧克力中的应用研究

    Application of tiger nut oil-based cocoa butter equivalent in chocolate

    • 摘要: 为明确油莎豆油基类可可脂(CBE)对巧克力品质的影响,并评估其作为巧克力基料油的可行性,采用油莎豆油基CBE部分或完全替代天然可可脂(CB)制备巧克力样品,系统分析其晶型、热学性质及流变行为,并结合循环变温储存试验与感官评价综合评估产品品质。结果表明:纯CB巧克力、5%油莎豆油基CBE+95%CB巧克力及纯油莎豆油基CBE巧克力均主要形成β-V晶型,DSC熔化曲线均呈单一吸热峰,熔融峰值温度范围为33~34 °C;流变测试显示所有样品均呈假塑性流体特征;经56 d循环变温储存后,纯油莎豆油基CBE巧克力的起霜程度低于纯CB巧克力,且硬度随储藏时间延长呈先升高后略降的趋势;感官评价结果表明,纯油莎豆油基CBE巧克力在色泽、顺滑度及蜡感等感官指标上与纯CB巧克力无明显差异,整体接受度良好。综上,油莎豆油基CBE具备作为巧克力基料油的应用潜力。

       

      Abstract: To elucidate the effects of tiger nut oil-based cocoa butter equivalent (CBE) on chocolate quality and assess its viability as a chocolate fat, this study formulated chocolate samples by partially or fully replacing natural cocoa butter (CB) with tiger nut oil-based CBE, combined with cocoa powder, sugar, and other ingredients, followed by mixing, grinding, tempering, and molding. Sample quality was evaluated by characterizing crystal morphology via X-ray diffraction (XRD), analyzing thermal properties using differential scanning calorimetry (DSC), determining rheological behavior with a rotational rheometer, assessing storage stability through a cyclic temperature storage test, and scoring sensory attributes by a 20-member professional panel according to established criteria. XRD and DSC results indicated that chocolates containing pure CB, 5% tiger nut oil-based CBE + 95% CB, and pure tiger nut oil-based CBE all predominantly formed the stable β-V crystal form, exhibiting a single endothermic peak in DSC with a melting temperature range of 33-34 °C. Rheological tests revealed that all samples exhibited pseudoplastic fluid behavior. After 56 days of cyclic temperature storage, the pure tiger nut oil-based CBE chocolate exhibited less bloom than natural cocoa butter chocolate. Hardness gradually increased during storage, peaking around day 49; although slightly reduced by day 56, it remained significantly higher than the initial value. Sensory evaluation revealed no significant differences between pure tiger nut oil-based CBE chocolate and CB chocolate in core attributes-including color, gloss, smoothness, and waxy texture-with both receiving favorable overall acceptance. In summary, tiger nut oil-based CBE demonstrates potential for application as a cocoa butter alternative in chocolate.

       

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