Abstract
This study aimed to define the proportion of purple sweet potato addition as a substitute ingredients of the ice cream edible cup and to reduce its baking time. This study was designed using Central Composite Design (response surface method) with 2 factors, i.e. the proportions of purple sweet potato powder and the baking time with water content, cup resistance, and fracturability as the responses. The main component of purple sweet potato ice cream cup is starch and cellulose as shown by the characteristic of the functional group which are C-H of alkene, C= C of alkyna, C = O of aldehyde/ketone/carboxylic acid/ester, C-C group of aromatic ring, C-O alcohol/ether/carboxylic acid/ester, C-H of aromatic ring and C-H of alkene. The result of the study showed that the the optimum proportion of purple sweet potato powder was 75% and the baking time was 45 minutes with the water content of 4.37%, cup resistance of 253.64 minutes, fracturability of 0.2125 N, protein content of 4.79%, and carbohydrate content of 4.66%. Based on the consumer’s acceptance aspect, purple sweet potato ice cream cup was the mostly liked because of its texture and flavor, meanwhile its color and aroma was the mostly disliked.
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