The Effectiveness of Combination Stabilizers and Ultrasound Homogenization in Milk Ice Cream Production

Abstract

This study aims to contribute knowledge to the area of the ice cream industry by finding an effective way to prevent the recrystallization process in ice cream production. Stabilizers such as ɩ-carrageenan and its acid and enzymatic hydrolyzates were used with the combination of ultrasound homogenization (20 kHz and exposure time of 5 min) as a method to obtain the deliberate quality of ice cream. In this paper, a comprehensive analysis of the physical characteristic of milk ice creams was made, such as the cryoscopic temperature, osmotic pressure, overrun, and melting time. It was noted that cryoscopic temperature was lower in the samples after ultrasound treatment. Additionally, the osmotic pressure was changed in the case of the stabilizer used. The overrun of ice cream was less than 32% while the longest melting time was at the level of 27 min. The recrystallization process was analysed on the basis of images taken after 24 h, and 1 and 3 months of storage at −18 °C. Regarding the results, it was observed that ultrasound homogenization contributed to smaller ice crystals and had a positive influence on the ice crystals’ structure.