Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Quality Characteristics of Low-Fat Butter Sponge Cakes Prepared with Whey Protein Isolate

Whey protein isolate가 첨가된 저지방 버터 스폰지 케이크의 품질 특성

  • Kim, Chan-Hee (Department of Food & Nutrition, Sungshin Women's University)
  • 김찬희 (성신여자대학교 생활과학대학 식품영양학과)
  • Received : 2009.10.11
  • Accepted : 2009.11.25
  • Published : 2010.04.30
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Abstract

The effects of substituting whey protein isolate (WPI) for butter in the preparation of butter sponge cake were determined by objective and subjective tests. The specific gravity of cake batter, the cooking loss and moisture content of cake were all decreased with increasing amounts of WPI, whereas specific loaf volume was increased. With increasing WPI content, redness of crust and crumb, as well as lightness of crumb were increased, whereas lightness of crust, as well as yellowness of crust and crumb were all decreased. Hardness, chewiness, gumminess, adhesiveness and fracturability were increased significantly with increasing amounts of WPI, however, cohesiveness, springiness, and resilience were decreased. In the sensory evaluation, 20% WPI-substituted cake displayed scores similar to those of control. These results suggest that substitution of 20% WPI could be the best ratio for the preparation of butter sponge cake.

본 연구에서는 버터 스폰지 케이크 제조시 버터 대신 WPI를 여러 가지 비율로 대체하여 제조한 후 반죽의 특징 및 제품의 품질 특성을 평가하였다. WPI 대체율이 증가할수록 케이크 반죽의 비중은 일정하게 감소하였지만 점도는 일정한 경향을 보이지 않았고, 완성된 케이크의 굽기손실율은 감소하면서 비용적은 증가함을 보였다. 외형은 W-20과 W-40이 가장 바람직한 버터 스폰지 케이크의 형태를 가지는 동시에 질감도 control과 유사한 정도로 부드러웠다. WPI 80% 이상 대체의 경우 케이크의 부피는 커졌지만 WPI의 열에 의한 응고로 인해 부드럽다기보다는 오히려 무겁고 단단한 케이크가 되었다. WPI 대체량이 증가할수록 케이크의 수분함량이 감소하면서 응집성, 탄성, 복원성이 감소된 반면 경도, 씹힘성, 점착성, 부착성, 부숴짐성은 증가함을 보였고 케이크 중 W-20은 control과 비교시 모든 값에서 유의적으로 유사함을 보였다. 케이크의 crust 색은 WPI가 많을수록 명도와 황색도가 감소한 반면 적색도는 증가하였고 crumb의 경우 명도 결과만 상반된 변화를 보였다. 관능 결과에서도 W-20이 control과 비교해 볼때 가장 유사한 것으로 평가되었다. 이상의 결과에서 WPI 대체 버터 스폰지 케이크의 최종 품질은 이화학적 및 관능적 특성에서 가장 좋은 결과를 나타낸 W-20이 우수하였고 40% 이상 대체시에는 전체적으로 좋지 않은 결과를 보였다. 따라서 버터 스폰지 케이크 내에서 버터 대체물로 이용하는 WPI의 가장 적절한 대체비율은 20%로 제시할 수 있을 것으로 보인다. 그리고 케이크 이외에 유지를 사용하는 식품에도 적용될 수 있도록 WPI를 이용한 지방 대체 식품의 범위를 확대하는 방법에 대한 연구도 필요하다고 사료된다.

Keywords

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