Mannitol Icing Composition for Bakery Freeze-Thaw Stability
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Solution Overview
Problem
Conventional icings for bakery products destabilize during storage due to moisture absorption, leading to staleness and freeze-thaw instability, particularly in fried products like doughnuts, where moisture migration and water absorption cause the icing to weep and lose integrity.
Innovation Solution
A specialized icing composition comprising 30-75 wt.% fine carbohydrate particles (at least 90% crystalline, <50 μm diameter), 15-50 wt.% fat with a melting point of at least 20°C, and 0-30 wt.% water, with 50-100 wt.% mannitol particles and 0-50 wt.% sugar particles, providing high freeze-thaw stability and reduced water absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional icing is applied to fried bakery product, then the product can be decorated and stored, but the icing rapidly absorbs moisture from the crumb causing staleness and hardening
Solution Approach 1:
The patent changes the chemical composition parameters of the icing by using mannitol instead of conventional sugars, and by controlling particle size distribution (at least 90% of particles less than 50 μm in diameter). These parameter changes make the icing non-hygroscopic and resistant to moisture absorption, resolving the contradiction between icing stability and moisture content.
Solution Approach 2:
The icing composition is a composite material combining mannitol particles (50-100 wt.%), sugar particles (0-50 wt.%), fat (15-50 wt.%), and water (0-30 wt.%). This composite structure leverages the non-hygroscopic properties of mannitol while incorporating fat and water in controlled amounts to achieve both stability and desirable texture.
2Reliability
If high sucrose concentration icing is used for freeze-thaw stability, then the icing can withstand freezing, but atmospheric water condenses and sucrose attracts moisture causing weeping and loss of integrity
Solution Approach 1:
The patent changes the sugar type parameter from sucrose to mannitol, which fundamentally alters the hygroscopic properties. Mannitol does not attract moisture like sucrose, eliminating the weeping problem while maintaining freeze-thaw stability. The particle size parameter is also optimized to ensure proper texture and stability.
3Reliability
If fine carbohydrate particles with small diameter are used, then the icing maintains stability and resists moisture absorption, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a particle size parameter where at least 90% of carbohydrate particles must be less than 50 μm in diameter. This precise parameter control ensures the icing's non-hygroscopic properties and stability while providing clear manufacturing specifications for consistent quality.
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 icing composition maintains stability and integrity for several days under ambient conditions, preventing moisture absorption and maintaining quality, even after thawing, as demonstrated by its superior performance compared to sucrose-based icings and non-hygroscopic carbohydrates like trehalose and palatinose.
Implementation Method 1
the icings according to the present invention do not destabilize during storage due to absorption of atmospheric water and/or of water contained in the bakery product onto which the icing is applied
Implementation Method 2
15-50 wt. % of fat having a melting point of at least 20° C.
Implementation Method 3
30-75 wt. % of fine carbohydrate particles containing at least 90 wt. % of crystalline carbohydrate, at least 90 wt. % of said fine carbohydrate particles having diameter of less than 50 μm
Data Source
AI summary
The invention relates to an icing composition that consists of: 30-75 wt. % of fine carbohydrate particles containing at least 90 wt. % of crystalline carbohydrate, at least 90 wt. % of said fine carbohydrate particles having diameter of less than 50 μm; 15-50 wt. % of fat having a melting point of at least 20° C.; 0-30 wt. % water; and 0.1-30 wt. % of other edible ingredients; wherein the fine carbohydrate particles comprise: —50-100 wt. % of mannitol particles containing at least 90 wt. % mannitol; —0-50 wt. % of sugar particles containing at least 90 wt. % of one or more sugars selected from sucrose, glucose, fructose, lactose and maltose. The icing composition enables the preparation of iced bakery products that exhibit high freeze-thaw stability and that can suitably be stored for several days under ambient conditions without becoming stale. The invention further provides a method of preparing a bakery product that comprises applying the aforementioned icing composition onto a fully cooked bakery product as well as an iced bakery product comprising a fully cooked bakery product that is covered with a layer of such an icing composition.