• The Korean Journal of Food And Nutrition
• /
• v.35 no.6
• /
• pp.499-512
• /
• 2022

This study investigated the quality characteristics and antioxidant effects of rice cookies containing different percentage of freeze-dried plum powder (3%, 5%, 6%, and 12%). The density of the dough and the thickness of the rice cookies from the control group and the additive group were not significantly different. The pH value of the dough, its moisture content and spread factor, as well as the Hunter's L and b values of the rice cookies significantly decreased as the amount of dried plum powder added increased. However, the sweetness, hardness, thickness, Hunter's a value, total polyphenol, total flavonoid and anthocyanin contents, DPPH and ABTS free radials scavenging activity, and ferric reducing antioxidant power of the rice cookies significantly increased as the amount of dried plum powder added increased. Overall, the results of this study showed that adding dried plum power enhanced the antioxidant activities and quality characteristics of rice cookies.

• The Korean Journal of Food And Nutrition
• /
• v.31 no.4
• /
• pp.478-484
• /
• 2018

This study evaluated the quality characteristics of rice cookies prepared with different amounts (0%, 5%, 10%, and 15%) of hempseed powder. The values of density and pH in the cookies did not significantly differ among the groups. The moisture content ranged from 4.86% to 5.83% and was the highest in control groups. The spread factor increased with increasing hempseed powder concentration. The lightness value decreased with increasing amounts of hempseed powder, while the redness and yellowness values did not differ among groups. The incorporation of hempseed in cookies increased cookie hardness. A consumer acceptance test revealed that cookies with hempseed powder added were more preferable than those of the control groups in terms of overall acceptability. The total polyphenol content of the control groups was 7.15 mg GAE/100 g, while that of the hempseed added groups ranged from 12.36 to 17.17 mg GAE/100 g. The substitution of wheat flour for hempseed powder yielded rice cookies with a higher DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity. The above results indicate that the most desirable cookies were those prepared with the addition of 15% hempseed powder.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.42 no.8
• /
• pp.1277-1282
• /
• 2013

The effects of pregelatinized rice flour (PRF) as an additive on the textural properties of rice cookies were investigated in this study. PRF was used at 10, 20, 30, 40, 50, and 60% per 100 g of rice flour. The hardness of dough and cookies, as measured by a texture analyzer, increased upon the addition of PRF. In contrast, the moisture content of the dough and cookies decreased upon the addition of PRF. The L value of the dough and cookies decreased upon the addition of PRF, whereas the a value increased upon the addition of PRF. The bulk density of the cookies increased upon the addition of PRF. In addition, the spreadability of the cookies was lower than the control. In the sensory evaluation, rice cookies with 50% PRF showed the highest scores for hardness, brittleness, softness, and moisture. Rice cookies with 60% PRF showed the highest scores for sandiness. Our results suggest that the texture of the rice cookies can be improved by adding PRF.

• Korean journal of food and cookery science
• /
• v.31 no.6
• /
• pp.733-740
• /
• 2015

This study was performed to examine the functional and quality characteristics of rice cookies with added Ligularia fischeri (Ledeb.) Turcz. powder. Rice cookies were prepared with different amounts (0%, 0.5%, 1%, 1.5% and 2% to the flour quantity) of Ligularia fischeri powder. The antioxidant activities of Ligularia fischeri powder, specifically the total phenolic content, DPPH free radical scavenging activity and reducing power were found to be 212.19 mg GAE/g, $11.78{\mu}g/mL$11.78 ($IC_{50}$), and 2.33 (O.D.), respectively. The antioxidant activities of the rice cookies with added Ligularia fischeri powder increased with increasing concentrations of Ligularia fischeri powder. Regarding the hunter's color value of rice cookies with added Ligularia fischeri powder, L (lightness) and a (redness) values decreased (p<0.001) with increasing concentrations of Ligularia fischeri powder, whereas b (yellowness) values increased (p<0.01). The consumer acceptability score for the 3% Ligularia fischeri rice cookie groups ranked significantly (p<0.001) higher than the other groups in color, flavor, taste, texture and overall preference. These results suggest that Ligularia fischeri powder will be useful as a functional food resource with antioxidant activities.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.42 no.11
• /
• pp.1813-1820
• /
• 2013

This study is conducted to investigate the quality characteristics of cookies containing different levels (0%, 20%, 40%, 60%) of brown rice powder with enhanced levels of GABA (${\gamma}$-amino butyric acid). The pH of cookie dough was higher in cookies containing brown rice powder. A proximate composition analysis showed that the moisture content was increased with the addition of the brown rice powder, yet there was no significant difference in the crude protein and crude fat contents among the added groups. The ash content was the highest in the 60% added group. The spread factor of the control cookie was higher than that of cookies containing 40% and 60% brown rice powder. The incorporation of brown rice powder in cookies lowered the lightness and yellowness values, but increased the redness value. The hardness of the cookies was lower in 40% and 60% added groups than that of the controls. The GABA content in the brown rice added groups was higher than that of the control cookie, and increased as brown rice powder increased. A consumer acceptance test revealed that there was no significant difference in the overall preference scores among the cookies. From these findings, it is suggested that the cookies with brown rice powder up to 60% added can be developed as goods.

• Journal of the Korean Society of Food Culture
• /
• v.36 no.4
• /
• pp.382-391
• /
• 2021

This study was conducted to find out the bakery processing suitability of maca and to develop rice-based processed foods. We investigated the antioxidant activity and physicochemical properties of rice cookies prepared with the addition of maca (Lepidium meyenii) powder (1%, 2%, 3%, and 4% of the total materials). We observed an increase in the total polyphenol and flavonoid content, and DPPH-ABTS⁺ radical scavenging activity of the rice cookies as the proportion of added maca powder increased (p<0.05). The quality characteristics such as the "a" value, "b" value, and the hardness of the cookies increased with an increase in the proportion of maca powder (p<0.05) in the cookie, whereas the moisture content, pH of the dough, spread ratio, loss rate, leavening rate, and "L" values showed a significant decrease (p<0.05). In the sensory evaluation results, consumer acceptability showed a significantly higher value in the 2% maca cookie group (p<0.05), and the characteristic intensity rating (color, flavor, bitterness) increased as the proportion of maca added to the cookie increased (p<0.05). Therefore, this suggests that adding 2% maca powder as the functional ingredient in rice cookies can result in rice bakery products with excellent qualities.

• Korean journal of food and cookery science
• /
• v.31 no.2
• /
• pp.136-143
• /
• 2015

The aim of this study was to evaluate the quality characteristics and anti-oxidative activities in the rice cookies with R. glutinosa Preparata (0%, 4%, 8%, 12%) and bean flour (10%). The moisture of cookies was increased depending on amount of R. glutinosa Preparata (RRP). The pH of cookies with RRP was lower than that of the control cookies. Sugar content and reducing sugar of cookies were increased according to the amount of RRP. L-value and b-value of cookies with 12% RRP were lower than the control, whereas a-value was higher than the control. Spread factor of cookies with RRP was lower than the control, and hardness of cookies was increased depending on amount of RRP added. The antioxidant activity such as DPPH radical and hydroxyl radical scavenging activity was significantly increased in the cookies with RRP, compared with that of the control. Also, total phenol content of cookies was increased according to the amount of RRP. In sensory test, cookies with 8% RRP received the highest score for overall preference. As a result, the optimum amount of RRP concentrate to be added in the cookies was found to be 8%.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.42 no.9
• /
• pp.1426-1432
• /
• 2013

Changes in the textural properties of rice cookies as a result of using roasted soybean flour (RSF) as an additive were investigated in this study. RSF was replaced as 3, 6, 9, 12, 15 and 20% of 100 g of rice flour. The addition of RSF increased the hardness of dough and cookies as measured by texture analyzer (TA), whereas moisture content of dough and cookies decreased upon addition of RSF. Further, the addition of RSF led to an increase in the L value of dough and cookies, but to a decrease in the a and b values. In addition, the bulk density of cookies decreased upon addition of RSF, whereas bulk density of dough also declined when compared to control. The spreadability of cookies was found to be lower in comparison to control. The values of ${\Delta}bulk$ densities (BD) and ${\Delta}hardness$ of cookies also increased upon addition of RSF. From the point of view of sensory evaluation, addition of 9% RSF to rice cookies showed the highest score in terms of overall acceptability and softness. A 12% RSF addition to rice cookies led to the highest score in sandiness. As a result, we conclude that the crispy texture of the rice cookie can be improved by adding RSF.

• Food Science and Preservation
• /
• v.20 no.3
• /
• pp.348-355
• /
• 2013

This study was conducted to analyze the sensory profiles of commercial rice cookies and snacks in the market and to provide fundamental data on the development of rice cookies and snacks. The sensory characteristics of 10 kinds of Korean commercial rice cookies and snacks were evaluated using a sensory test and were analyzed via quantitative description analysis (QDA) and principal component analysis (PCA), depending on their rice contents and processing methods. The rice cookies and snacks with less than 30% rice contents and that were fried were preferred, and their grainy attribute was related to the preference for them. Then 27 kinds of commercial rice cookies and snacks from three countries, Japan, the U.S.A. and China, were also evaluated and compared with those from Korea. While the Korean commercial rice cookies and snacks were sweet, grainy and crispy, those of Japan were not sweet and instead, were salty and crispy.

• The Korean Journal of Food And Nutrition
• /
• v.34 no.1
• /
• pp.1-14
• /
• 2021

This study evaluated the antioxidant activity and quality characteristics of rice cookie with added butterbur powder in a ratio of 0, 5, 10, 15, and 20% to confirm the possibility of butterbur as a functional food. The moisture content, spread factor, leavening rate, and hardness of rice cookies increased with an increase in the amount of butterbur powder; whereas a decrease in the pH and baking loss rate was observed. The L and b values decreased as the amount of butterbur powder increased, but the value was the lowest when 5% of butterbur powder was added. The sensory liking score showed the highest preference for 10% butterbur powder regarding appearance, flavor, taste, texture, and overall preference. In the principal component analysis (PCA), the addition of 10% butterbur powder positively affected the measure of food acceptance in terms of organoleptic properties of butterbur. Besides, as the amount of added butterbur powder increased, the antioxidant activity of rice cookies increased. Based on these results, it appears that the addition of butterbur powder to rice cookies in a 10% ratio can produce rice cookies with excellent antioxidant activity, overall quality, and high preference.