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Mochi is a cake made from glutinous rice flour with other ingredients and then steamed. White sweet potato flour is used as a substitute because it contains high levels of fiber, with the addition of elephant ginger extract, which is expected to be able to neutralize the unpleasant taste and scent of white sweet potato flour. The aim of this study was to determine the right formulation in order to obtain white sweet potato flour substitution mochi and a high concentration of elephant ginger extract. This study used a completely randomized design (CRD), which consisted of two factors, namely the concentration of glutinous rice flour and white sweet potato flour (90:10, 80:20, and 70:30) and the percentage of elephant ginger extract (to 100 ml of water) (1.5%, 3%, and 4.5%). The best results of the chemical analysis were white sweet potato flour 30 g and ginger extract 4.5%, with a moisture content of 23.66%, an ash content of 0.25%, a total sugar content of 7.64%, and fiber of 2.60%. Based on the results of the physical analysis, the colour L*47.62 (bright brown), a* -4.68 (slightly green), b* 12.20 (yellowish) and a hardness value of 8.90 N, gumminess of 6.27 N, chewiness of 1.73 N, cohesiveness of 0.71 N, and adhesiveness of 1.17 N. Mochi with white sweet potato flour substitution and concentration of elephant ginger extract can be a nutritions food and a source of fiber.

This research aims to develop takoyaki by substituting wheat flour using white sweet potato flour (Ipomea Batatas Linneas) and adding powdered creamer.  White sweet potatoes were chosen for their high nutritional content and ability to improve texture and taste. Apart from that, processing white sweet potatoes into flour can extend the shelf life and increase the economic value of local agricultural products. The addition of powdered creamer can produce takoyaki with a softer texture and provides a creamy touch which increases the appeal of the final product. Organoleptic tests were carried out on 40 panelists to assess the criteria for shape, color (outside and inside), aroma, texture, taste and overall preference for whether it was well received by consumers. The research results showed that the proportion of 90% wheat flour and 10% white sweet potato flour produced the best quality takoyaki based on organoleptic test scores.  Apart from that, takoyaki products with a proportion of wheat flour and white sweet potato flour with the addition of powdered creamer contain 12.85% protein, 4.03% fat, 41.05% carbohydrates which have a high fiber content compared to conventional takoyaki. The cost of raw materials for takoyaki with the proportion of wheat flour and white sweet potato flour (Ipomea Batatas Linneas) is Rp. 40,365. The selling price of Takoyaki with a proportion of wheat flour and white sweet potato flour (Ipomea Batatas Linneas) is 19,000/portion.