Optimasi Formula dan Proses Pembuatan Muffin Berbasis Substitusi Tepung Jagung dan Ubi Jalar Kuning

Abstract

Nowadays, the high domestic consumption of wheat-based bakery product has increased the amount of imported wheat flour in Indonesia. Food diversification using local resources becomes one of the solutions to reduce the cost associated with imported wheat flour. The objective of this research is to make composite flour (consists of corn flour and sweet potato flour) substituted muffins that is sensory acceptable by consumers. This research is divided into 3 stages namely formula optimization using mixture design technique, process optimization using response surface methodology, and final product analysis, which consists of texture analysis and proximate analysis. Hedonic rating test is carried out to collect the response from 70 untrained panelists. The results showed that the formula with 4% wheat flour, 86% corn flour, and 10% sweet potato flour was selected as optimal formula while the process with 39 minutes of baking time and 158°C of baking temperature was chosen as optimal process. The hardness score of muffin produced from optimal formula and process is equivalent to 107.3 gf. The final product contained 18,84% moisture, 1.48% ash, 4.78% protein, 18.23% fat, 56.67% carbohydrate, and 0.26% crude fiber.