Study on the Preparation Process ofEight-Treasure Tea FlavoredFermented Milk
WANG Qi1 ,SUN Fangyan2,ZANG Xicui2 (1.Ningxia Polytechnic,Yinchuan 750021, China; 2.Ningxia Saishang DairyCo.,Ltd.,Yinchuan 750200,China)
Abstract:With eight-treasure tea and milk powder as the main raw materials,eight-treasure tea flavored fermented milk was prepared by fermentation process,and the sensory score was used as the evaluation index.The preparation process was optimized by single factor experiment and orthogonal experiment.The results showed that the optimal preparation process parameters of eight-treasure tea flavored fermented milk were 0.4% addition of eight-treasure tea concentrate, 6% addition of white sugar, 0.02g/100g additionof bacteria,and 4h fermentation time.The fermented milk prepared bythis processhas both the unique frankincense flavor offermented milk and the appropriate eight-treasure tea flavor, with uniform and delicate texture and good sensory quality.
Keywords: eight-treasure tea; fermented milk; preparation process
八寶茶屬于寧夏地區特色茶飲,由枸杞、紅棗、桂圓、芝麻、陳皮、核桃、玫瑰和綠茶等多種食材組成,富含多種生物活性化合物,具有抗氧化、補氣養血和抑制色素沉著等功效[1。其口味甘甜,深受年輕消費者喜愛,是一種兼具營養與地域文化特征的傳統飲品[2]。奶產業是寧夏的特色優勢產業,也是優化調整農業結構的重點產業。然而,目前寧夏乳制品以液態奶為主,奶粉、奶酪、稀奶油等精深加工產品占比較低、附加值不高[3]。將八寶茶與發酵乳結合,不僅能夠賦予發酵乳全新的風味,提高其抗氧化活力,還能更好地滿足消費者的多樣化需求。在當下文旅融合的時代背景下,以八寶茶風味發酵乳為載體開發具有地方特色的旅游食品,有望為寧夏旅游食品開發提供可行路徑,為文旅產業發展注入新動能。
本研究通過制備八寶茶濃縮物并將其添加至發酵乳中,研制出八寶茶風味發酵乳。以感官評價為考察指標,利用單因素實驗結合正交實驗對制備工藝進行優化,為八寶茶風味發酵乳及相關產品開發提供理論依據和技術指導。
1材料與方法
1.1材料與試劑
全脂乳粉,恒天然集團;白砂糖,市售;八寶茶(枸杞、紅棗、桂圓、核桃、芝麻、陳皮、玫瑰、綠茶),市售;菌種(保加利亞乳桿菌、嗜熱鏈球菌),丹尼斯克集團;氫氧化鈉,分析純,廣州和為醫藥有限公司;VRBA培養基、BGLB培養基,青島海博生物技術有限公司。
1.2儀器與設備
CP214電子天平,奧豪斯儀器有限公司;料理機,九陽有限公司;……