Formulasi Chocolate Filling dan Pengaruhnya terhadap Perubahan Mutu Roti Manis

Abstract

Sweetbread filled with chocolate is the most popular but this bread’s crumb generally becomes hard (staling) faster. Lower water activity of filling than crumb could drive water movement from the crumb into the filling caused crumb become dry and hard. The purpose of this research are to study the effects of the type and the percentation of emulsifiers (SSL and GMS; 0.8%, 1.0%, 1.2%, 1.4%) and margarines (Blueband and Simas Palmia; 25.5%, 27.5%, 29.5%, 31.5%) to the characteristic of chocolate filling and study the chocolate filling effect on quality changes of sweetbread. The selected formulas from those formulations were applied in sweetbread and sensorically evaluated with hedonic’s rating test. Texture profile, water content, and water activity of sweetbreads filled with chocolate were analyzed for 5 days of storage in room temperature. The type and the percentation of emulsifiers had significant effects on the viscosity, water activity, and emulsion stability of chocolate filling (p<0.05). The selected formulas were 1.2% SSL and 1.2% GMS. The following step showed that the combination of margarine-emulsifier and margarine percentation had significant effects on the emulsion stability and viscosity of chocolate filling (p<0.05). The selected formulas that filled into sweetbread were BB SSL 25.5%, SP SSL 27.5%, BB GMS 29.5%, dan SP GMS 27.5%. Organoleptic test showed that panelist preference on the aroma, color, and texture attributes of sweetbreads filled with different chocolate filling formulas are not significantly different including with the commercial product (p>0.05). Chocolate filling formulas and storage’s time significantly affected the value of hardness, chewiness, and water content of the crumb also the water content and water activity of chocolate filling in the sweetbread (p<0,05). The lowest rate of crumb hardness during storage was the sweetbread filled with chocolate GB3 (GMS 1.2%: BB 29.5%).