Liquid Starch Barrier Prevents Fat Migration in Chocolate Pralines
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Solution Overview
Problem
Existing edible barriers for preventing fat migration in composite foodstuffs, such as chocolate-coated pralines, are either aesthetically undesirable or adversely affect the taste and texture of the foodstuff, as they are solid and detectable during consumption.
Innovation Solution
A barrier composition comprising 1-40% starch with a degree of polymerization of no more than 90 and 40-90% plasticizer, preferably glycerol, along with up to 40% bulking agents like fructose, which is applied as a liquid to prevent fat migration between foodstuff elements without affecting organoleptic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid starch film barrier is used to prevent fat migration, then fat migration prevention is improved, but the organoleptic properties (taste and texture) deteriorate due to detectability during consumption
Solution Approach 1:
The patent changes the physical state parameter of the starch barrier from solid to liquid by controlling the degree of polymerisation (DP ≤ 90) and using plasticizers. This transforms the barrier into a liquid composition that is not detectable during consumption, thereby resolving the contradiction between effective fat migration prevention and maintaining organoleptic properties.
Solution Approach 2:
The patent creates a composite liquid barrier system combining low DP starch with plasticizers (such as glycerol, propylene glycol, or ethylene glycol) and optionally bulking agents. This composite approach enables the barrier to function effectively as a fat migration preventer while remaining undetectable in the final food product, thus resolving the technical contradiction.
2Ease of manufacture
If conventional manufacturing techniques are used to apply the barrier, then ease of manufacture is improved, but the barrier must be liquid at application point which requires specific viscosity control
Solution Approach 1:
The patent specifies precise viscosity parameters (5-600 Pa·s at 25°C) and controllable variables (water content up to 10%, temperature, starch to plasticizer ratio) to optimize the liquid barrier composition for conventional manufacturing techniques. This enables easy application through conventional methods while maintaining liquid state requirements.
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 barrier composition effectively prevents fat migration, maintaining the aesthetic and textural integrity of the foodstuff, as demonstrated by the absence of fat bloom and softening in chocolate-coated pralines over 32 weeks of storage.
Implementation Method 1
The type of starch employed is not believed to be of particular importance; for example, the amylase/amylopectin ratio of the starch is not believed to be important. It is preferred that the degree of polymerisation (DP) of the starch is no lower than 5, more preferably no lower than 10
Implementation Method 2
a barrier composition for use in foodstuffs which has little or no effect upon the organoleptic properties of the foodstuff and is effective to prevent migration of a component from one element of the foodstuff to another
Data Source
AI summary
A method of preparing a composite foodstuff is provided and comprises providing a core, providing a barrier composition and applying the barrier composition to at least a portion of the core and providing a fat based coating having a lower fat content than the core. The fat based coating is applied to the barrier coated cores. The hardness of the fat based coating does not decrease over a period of storage.