Trehalose Batter for Crisp Microwave Gyoza
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Solution Overview
Problem
Microwave oven cooking of noodle-strip foods like gyoza dumplings struggles to maintain a crisp texture and freshly pan-fried flavor and aroma due to water transfer from the filling, especially after freezer storage, with existing methods either failing to prevent water transfer or requiring cumbersome application of powders or oils.
Innovation Solution
A batter containing trehalose is interposed between a microwave-absorbing heat generator and the noodle-strip food, which, when heated, imparts a crisp texture and freshly pan-fried flavor and aroma to the heat-treated surface, with trehalose content ranging from 0.5% to 25% by weight and viscosity between 0.07 Pa·s to 8 Pa·s.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If edible oil is applied on the surface of a gyoza dumpling before storage, then water transfer from the surface is prevented, but water transfer from the filling cannot be fully prevented and the texture is deteriorated when cooked with a microwave oven
Solution Approach 1:
A batter layer is introduced as an intermediary substance between the microwave-absorbing heat generator and the gyoza dumpling surface. This batter contains trehalose and other ingredients that form a protective barrier, preventing direct water transfer from the filling to the dough while still allowing the heat generator to effectively heat the dumpling. The batter acts as a mediator that resolves the conflict between surface protection and internal moisture management.
Solution Approach 2:
The invention changes the chemical composition parameters of the coating by using a batter containing trehalose (0.5-25% by weight), grain flour, emulsifier, and oil or fat. This compositional change allows the coating to have different functional properties compared to simple oil application - it provides better water barrier properties while maintaining texture quality during microwave cooking through the specific combination of ingredients and their concentrations.
2Reliability
If a batter containing grain flour and protein is applied on the bottom surface followed by baking, then texture and flavor are improved immediately after baking, but water transfer from the filling deteriorates the texture and flavor after freezer storage and microwave cooking
Solution Approach 1:
The batter is applied to the gyoza dumpling surface before freezing storage, creating a protective layer in advance. This preliminary action ensures that when the dumpling is later subjected to microwave cooking after storage, the batter layer is already in position to prevent water transfer and maintain texture and flavor. The trehalose in the batter provides additional protection during the storage period.
Solution Approach 2:
The invention uses a composite batter material containing multiple components: trehalose (0.5-25% by weight), grain flour, emulsifier, and oil or fat. This composite material provides synergistic effects where each component contributes different functions - trehalose for water binding and protection, grain flour for structure, emulsifier for stability, and oil/fat for flavor and texture. This composite approach maintains texture and flavor quality throughout storage and cooking.
3Reliability
If a microwave-absorbing heat generator sheet is used to brown the food and impart crisp texture, then crisp texture and freshly pan-fried flavor are achieved, but the sheet requires end portions to be upwardly bent to prevent batter from flowing out during heating
Solution Approach 1:
The invention extracts the essential function of the heat generator sheet (providing microwave absorption and heat generation) while removing the problematic structural requirement (upwardly bent end portions). By using a flat sheet configuration with a batter-containing pouch placed on top, the solution separates the heat generation function from the batter containment function, eliminating the need for complex sheet folding while achieving the same cooking results.
4Reliability
If powder for baked gyoza dumpling is applied on the bottom surface before cooking, then crisp texture is achieved, but the method is cumbersome and requires application before cooking
Solution Approach 1:
The batter is applied to the gyoza dumpling surface during the manufacturing process, before the product is packaged and frozen. This preliminary action eliminates the need for consumers to apply any coating or powder at home before cooking. The batter is already in position when the dumpling is cooked, simplifying the consumer's task to merely placing the frozen dumpling in the microwave with the heat generator sheet.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively provides a noodle-strip food with a crisp texture and freshly pan-fried flavor and aroma upon microwave oven cooking, even after freezer storage, by using a batter with trehalose that enhances the texture and flavor retention during heating.
Implementation Method 1
a microwave-absorbing heat generator which generates heat with microwave energy
Implementation Method 2
the water transfer from the filling to the baked dough... water transfers from the filling to the baked dough
Data Source
AI summary
By interposing a batter containing trehalose between a microwave-absorbing heat generator which generates heat with microwave energy and a noodle-strip food, a crisp texture and a freshly pan-fried flavor and aroma can be exhibited by the batter upon microwave cooking.