Physical properties of bloom‐resistant chocolate using palm‐based no‐trans cocoa butter replacers

Abstract

In this study, two types of palm‐based trans‐free cocoa butter replacers (CBRs) were prepared using interesterification and solvent fractionation techniques. Fat A was prepared from palm oil (PO) and fully hydrogenated palm oil (FHPO), while Fat B was prepared from PO, FHPO, and palm kernel oil (PKO). The following results were obtained: (1) the two fats melted at 38–39°C; (2) an 80/20 mixture of Fat A/CB exhibited β'‐β transformation after 1 month, whereas an 80/20 mixture of Fat B/CB sustained the β' form for >2 months under thermal thawing conditions (17↔28°C); and (3) fat bloom was observed in the compound chocolate containing Fat A (80%) and CB (20%) after 2 months of storage, whereas no fat bloom occurred in the compound chocolate containing Fat B (80%) and CB (20%) for 3 months. This may be due to the addition of PKO‐based triacylglycerolss with the CN numbers ranging from 40 to 46 (total of 16.1%) in Fat B. Therefore, it was concluded that Fat B prepared from PO, FHPO, and PKO is a trans‐free CBR exhibiting high stability of the β' form.