Effects of Extra Virgin Olive and Riviera Olive Oil Addition on the Properties of Butter: an Optimization Study Based on D-Optimal Mixture Design

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Yalçın H. , Dursun Çapar T. , Kavuncuoğlu H.

Avrupa Bilim ve Teknoloji Dergisi, no.17, pp.546-555, 2019 (Other Refereed National Journals)

  • Publication Type: Article / Article
  • Publication Date: 2019
  • Doi Number: 10.31590/ejosat.580737
  • Title of Journal : Avrupa Bilim ve Teknoloji Dergisi
  • Page Numbers: pp.546-555


Increased consumption of butter is associated with high blood pressure and serum cholesterol level for humans. Therefore, we aimed to form a functional butter by blending it with vegetable oils. In this study, butter was mixed with both extra virgin olive oil (EVOO) and riviera olive oil at different concentrations (20%, 30%, 35% and 40%). D-optimal mixture design, having two mixtures (EVOO and butter, riviera and butter) was used to see the effects and to have the optimum mixing level. Physicochemical analysis (moisture, fat content, color and viscosity), sensory analysis were conducted. In addition, major fatty acid compositions of the samples were characterized. Also, the effect of oil concentration on the texture of butter was evaluated. It was observed that viscosity of butter was decreased 104.2 mPa.s to 28.75 mPa.s by blending with vegetable oil. Addition of riviera olive oil increased L* values, but decreased a* and b* values. Vegetable oil additions led to significant reduction in total saturated fatty acid levels and a significant increase in the levels of total unsaturated fatty acid (p<0.05). In sensory evaluations, the samples blended with 20% extra virgin olive oil and riviera olive oil received the highest rating. The results show that addition of vegetable oil improved the spreadability of butter and may be used as a functional fat.