Physicochemical properties of instant beverage powders from red dragon fruit peel extracts with maltodextrin and cocoa powder as fillers

Abstract

The peel of red dragon fruits contains a bioactive component, which is beneficial as a raw material to make instant beverage powder. The peel extract was combined with milk and a filler and then dried with a spray drying method. The study aimed to determine the characteristics of instant powder with a maltodextrin and cocoa powders as fillers. 15% filler of the total volume of liquid was added, and the treatment of ratio of maltodextrin and cocoa powders were P1 (15%:0%), P2 (14.5%:0.5%), P3 (14%:1%), P4 (13.5%:1.5%), and P5 (13%:2%). The results showed that the solubility of instant powder was 92.86-97.13% with a pH value of 5.73-5.96. The moisture content of powder was 3.95% -4.45%. Meanwhile, protein and fat contents were 8.23%-9.34% and 0.30%-0.84%, respectively. The highest total phenolic content of instant powder was 60.17 mg GAE/100g of the sample.