• 한국식생활문화학회지
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• 제22권4호
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• pp.434-440
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• 2007

Yackwa is used as one of foods prepared for traditional rituals and holidays and enjoyed as snacks. Since Yackwas are fried, they contain oil, which can cause rancidity and undermines the freshness of Yackwas during distribution to retailers, not to mention a high level of calories. The study aims to develop baked Yackwas and analyze the quality in terms of calorie levels and characteristics by baking Yackwas in oven. Calorie level was 4.65 kcal/g in fried Yackwa, 3.96 kcal/g in baked Yackwa, and 2.95 kcal/g in baked peanut Yackwa prior to dip coating of grain syrup. baked Yackwa showed hardness of 13476.33 $g/cm^2$ before dipping in grain syrup, which was harder than 1912.56 $g/cm^2$ of fried Yackwa. After grain syrup coating, hardness of baked Yackwa reduced more significantly, compared with that of fried Yackwa, as grain syrup permeated through texture of Yackwa. And less hardness makes baked Yackwa tastier. Sensory evaluation was measured in a 5-point scale. Scores for texture and taste of baked Yackwa outpaced those of fried Yackwa. Score for the overall quality was 3.65 in baked Yackwa and 3.25 in baked peanut Yackwa, compared to 2.85 of fried Yackwa, indicating a higher potential of commercializing(p<0.05).

• 한국식생활문화학회지
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• 제9권4호
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• pp.335-340
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• 1994

The objective of this study was to determine effects of soybean oil(SO), cottonseed oil(CO) and ricebran oil(RO) on stability and flavor of yackwa. This study consisted of yackwa fried in 3 differnet oils, then stored for 0, 3, 6 weeks in normal wrap at room temp. or vaccum package at $4^{\circ}C$. The moisture, oil contents, Hunter color values(L, 'a' and 'b'), % free fatty acid(FFA), thiobarbituric acid(TBA) value and sensory scores for color, flavor and acceptability were analyzed. The foam height of the oil after frying was also determined. Yackwa fried in RO was more red('a'=11.43) than yackwa fried in SO(10.64) or CO(10.51). TBA value of yackwa showed no difference among frying oils. Yackwa fried in SO showed better acceptability than those fried in CO. Yackwa fried in RO showed similar acceptability to yackwa fried in SO. The % FFA and TBA value of yackwa averaged across oil and package showed increasing tendency during 6 weeks storage.

• 한국식품조리과학회지
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• 제14권3호
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• pp.241-249
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• 1998

The purpose of this study was to develop a recipe for high quality Yackwa (fried cake made of wheat flour) by adjusting the mixing ratio of flours, frying temperature and time. Yackwas were prepared by using 3 kinds of flour mix (3：7, 4：6, and 2：8 of weak to medium ratio), fried at various temperatures and times, and evaluated by mechanical characteristics and sensory evaluation. It was found that Yackwa prepared with 3：7 mixing ratio of flour and fried at 160$^{\circ}C$ for 9 min was most preferred. Yackwas with the same flour mixing ratio and fried at 150-155$^{\circ}C$ for 12∼16 min were also within the range of acceptance. The characteristics of desirable Yackwa were suggested to be soft, crispy, and to have little taste of oil.

• 한국식품과학회지
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• 제49권1호
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• pp.63-71
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• 2017

This study aimed to assess the antioxidative potential of adding ethanolic extracts from Ulmus davidiana to Yackwa (Korean fried cookie). The reducing power and antioxidant activity of U. davidiana-treated Yackwa were assessed against DPPH, nitric oxide, superoxide anions, superoxide dismutase, and ABTS radicals. Increasing the amount of U. davidiana extract in Yackwa dough resulted in improved antioxidant properties. U. davidiana extracts were effective antioxidants with a radical scavenging potency similar to the potency of butylated hydroxytoluene (BHT) and L-ascorbic acid. The DPPH and nitric oxide radical scavenging activity of Yackwa containing 0.2% U. davidiana resulted in increased oxidative stability relative to control dough. Although the antioxidant effects of Yackwa containing U. davidiana extract were lower than those of Yackwa containing BHT and L-ascorbic acid, these results suggest that U. davidiana extracts have potent antioxidant activity. Accordingly, U. davidiana extract is a potential additive for deep-fried foods, such as Yackwa, to improve their oxidative stability.

• 한국식생활문화학회지
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• 제24권4호
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• pp.426-432
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• 2009

The quality of baked Yackwa with rice bran oil varied with dipping temperature (80 and 25$^{\circ}C$) and dipping time (5, 10, and 15 minutes at 80$^{\circ}C$, and 60, 90, and 120 minutes at 25$^{\circ}C$). The moisture content and hardness of baked Yackwa increased and decreased, respectively, with dipping time. The expansion ratio increased with time when baked Yackwa was dipped at 80$^{\circ}C$, but decreased with time when dipped at 25$^{\circ}C$. Flavor and color were optimal for product dipped at 80$^{\circ}C$ for 15 minutes followed those dipped at 25$^{\circ}C$ for 120 minutes; the dipping conditions produced no significant difference in the degree of expension, aroma, texture, and overall quality. Baked Yackwa showed better results than fried Yackwa in sensory evaluation.

• 한국식품조리과학회지
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• 제7권2호
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• pp.41-49
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• 1991

Yackwa is a Korean traditional fried cake made by went flour, sesame oil and honey. This study was investigated to the Rice-Yackwa for the purpose of the improvement of Yackwa's quality and rice consumption by sensory evaluation and instrumental measurement. It was resulted that taste and flavor of Rice-Yackwas were better than those of Wheat-Yackwa by sensory evaluation. We tested whether the mesh of the rice (80,100,120) and swelling agents (baking power, soju : Korean alcholic beverage) affected the Rice-Yackwa's swelling or not. In result, not by soju but by baking powder Rice-Yackwas were swelled. But Rice-Yackwa was so hard, that the Yackwas were made by the two different compositions of mixed flour (rice : wheat ; 75:25, 50:50) exibited softer than those made by rice. The hardness of 25 g% mixed flour Yackwa was improved. And we examined the softening effect on rice and mixed flour Yackwa by the increasing storage periods (1, 2, 3, 5 days). Rice-Yackwa's hardness was changed more greatly than Wheat-Yackwa's by storage periods. In addition to we inspected the effluence of sesame oil in the pross of frying. Sesame oil (40%) was drown out the Rice-Yackwa.

• 한국식생활문화학회지
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• 제28권5호
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• pp.525-532
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• 2013

This study aimed to find oils that can replace high-priced sesame oil. The quality of baked Yackwa containing different types of oils (rice bran, olive, or sesame oils) and amount of oils (30, 35, 40%) were investigated. The hardness of the baked Yackwa depended on the amount of oil, as more oil led to a softer texture of baked Yackwa. According to sensory evaluations, baked Yackwa with rice bran oil received the highest score in taste quality, with sesame oil receiving the second highest score. The flavor of baked Yackwa containing the rice bran oil was also better than other samples. In contrast, there were no significant differences in taste between other samples, including baked Yackwa containing all ingredients, 40% sesame oil, and 40% olive oil. The overall acceptance showed the highest score in baked Yackwa with rice bran oil (35%). In conclusion, rice bran oil (35%) is recommended as an oil ingredient for baked Yackwa.

• Preventive Nutrition and Food Science
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• 제9권2호
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• pp.107-112
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• 2004

Texture hardening of Yackwa during storage is the major quality deterioration of Yackwa. In this study the effects of gellan gum and xanthan gum on texture hardening of Yackwa during storage were studied. Instrumental hardness and sensory evaluation results showed that addition of 0.05 % and 0.1 % of gellan gum or 0.1 % and 0.5 % of xanthan gum significantly decreased the hardness of Yackwa by 32 ∼ 63 % after 4 weeks of storage. Retardation of texture hardening was obtained even at the 0.05 % level of gellan gum, indicating that gellan gum was a more potent texture modifier for Yackwa than xanthan gum. Correlation analysis between moisture content and hardness of Yackwa showed that there was high correlation between moisture content and hardness of Yackwa after 4 weeks storage ($r^2$=-0.998), regardless of the initial moisture content. These results suggest that retardation of texture hardening during storage is primarily related to moisture retention of Yackwa during storage.

• 한국식품조리과학회지
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• 제8권3호
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• pp.297-307
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• 1992

This study has investigated a scientific approach to the manufacture of Yackwa, made by different frying conditions and has assessed texture characteristics through sensory evaluation and instrumental test. A standard Yackwa was made by frying at 150$^{\circ}C$ for 8 minutes and then soaking for 10 minutes in the newly developed syrup whose viscosity and sweetness were similar to expensive honey. The mixing ratio of the developed syrup was corn syrup: sugar: dextrose=32 : 1.5 : 1 (by weight), and me syrup was double-boned in a water bath for 20 minutes and men cooled to 25 C. As me results of sensory evaluation and instrumental test for Yackwa made by various frying conditions, the lower the frying temperature or me longer the frying time was the higher values of hardness and fracturability, while adhesiveness was the lower in almost all conditions. In the sensory evaluation of Yackwa with the similar outer color, mere were significant differences in me inner color, Crispiness and levels of rising and cracking.

• 한국식생활문화학회지
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• 제2권1호
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• pp.33-43
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• 1987

밀가루에 기름과 꿀을 섞어서 반죽하여 일정한 모양으로 만들어 기름에 지지고 다시 꿀을 묻힌 약과는 한국인의 대표적인 기호식품의 하나이다. 본 연구는 1600년대부터 1943년까지 간행된 모든 한글 조리서 중에서 약과가 기록된 조리서 13권과 1945년 이후의 조리서 14권을 중심으로 약과의 명칭과 모양의 변천, 반죽 재료와 반죽 방법의 변천, 기름에 지지는 방법, 즙청 재료와 방법, 고명 등을 시대적으로 비교 고찰하므로 약과 문화의 시대적 변천 과정을 연구하였다. 1. 약과의 명칭은 약과 과줄 조과라 칭하였으며, 모양은 새 짐승 원형 네모진 모양이 있었다. 크기는 지름이 약 3.5cm, 두께 $0.5{\sim}1.5cm$ 이었다. 2. 약과 반죽의 주재로는 밀가루 꿀 기름 술이었다. 밀가루 이외에 콩가루 찹쌀가루도 사용하였으며 꿀대신 조청 설탕물 설탕시럽 엿녹인 것을 넣기도 하였다. 기름은 주로 참기름을 넣었으나 사라다유 면실유도 넣었다. 술은 청주 소주 약주 막걸리 양주를 넣었으며 물은 끓인물을 넣었다. 그밖에 통깨 생강 후추가루 깨소금 생강즙 잣가루 소금 등을 넣었다. 3. 약과 반죽은 "반죽을 매우 찧어 도마에 놓고 망치로 사방을 모아 두드리라"는 방법과 "국수 반죽 모양으로 너무 치다르지 말고 가볍게 반죽해야 한다"는 두 가지 방법이 있었다. 1940년 이후의 대부분 조리서에서 "가볍게 살살 섞으라"고 하였다. 4. 기름에 지지는 방법은 "기름을 넉넉히 붓고 $120{\sim}160^{\circ}C$의 기름에서 속이 잘 익고 진한 갈색이 나도록 $5{\sim}15$분 가량 지져내라" 하였다. 이때 "기름의 온도가 너무 낮으면 모양이 부서지고 너무 높으면 단단해진다"고 하였다. 5. 즙청의 재료로 1940년 이전에는 꿀을 사용하였으나 그 후부터는 굴 조청 엿녹인 것 시럽 등을 사용하였다. 그밖에 향취를 위해 강즙 건강 유자즙을 넣었다. 6. 즙청 방법은 튀겨낸 약과의 기름을 빼고 뜨거울 때 넣어 오래 담가 두어야 연하고 맛이 있다고 하였다. 7. 고명은 잣가루 계피가루 설탕이었다.