Preparation of sunflower wax-based oleofoams and its application in inflatable reduced-fat mayonnaise

The present work aimed to prepare inflatable reduced-fat mayonnaise by using sunflower wax-based oleofoams (SWOF) as an oil phase. The effects of SW concentrations on the microstructure and the physical properties of oleofoams were investigated. Then the stable oleofoam formulations were chosen to prepare inflatable mayonnaise, and the functionality related to the physical (textural properties and thermal stability) and sensory attributes (appearance, color, and viscosity) of inflatable reduced-fat mayonnaise was compared with commercial low-fat mayonnaise (CLFM) & full-fat mayonnaise (CFFM). The microstructure study of SWOF indicated the presence of clearly visible SW crystals at the air-oil boundary and inside the continuous phase. This suggests that the stability of SWOF was accomplished through both Pickering and network crystallization. The SWOF exhibited a multi-layered sandwich structure, and the crystal layer thickness increased in oleofoams as the SW concentration rose. The oleofoams containing exceeded 6 wt% SW had better foamability and stability, a more elastic network, and a clear surface texture. Inflatable mayonnaise prepared by 10SWOF had comparable brightness, mouthfeel, and texture to CLFM, but sensitized to temperature. In general, the whipped mayonnaise prepared in this investigation had an acceptable appearance and textural properties and was suitable for foods that do not require heating. [Display omitted] •A new approach for fat replacement developed by incorporation of air in oil phase.•The stability mechanism of SWOF was both Pickering and network crystallization.•Inflatable mayonnaise made of SWOF had comparable properties to commercial mayonnaise.