Emulsion Process for Stable Reduced-Fat Chocolate
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Solution Overview
Problem
Existing technologies struggle to create stable emulsion-based chocolate products with reduced fat content and/or reduced calories, while maintaining a snappy texture at colder temperatures, particularly at freezing temperatures.
Innovation Solution
A stable emulsion of an aqueous phase in a lipid phase is created by dispersing the aqueous phase as droplets throughout a crystalline lipid phase, using an emulsifier and incorporating non-fatty cocoa solids and/or milk solids in the lipid phase, and then adding the lipid phase in at least two steps under controlled shear conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If water is added to chocolate products by forming emulsions with cocoa butter, then fat content and calories are reduced, but the product exhibits lumping, granulation, coarse mouth-feel, and phase separation
Solution Approach 1:
The lipid phase is added in two separate steps: first adding a portion of the lipid phase to form an initial emulsion, then adding the remaining lipid phase to achieve final stabilization. This segmented addition prevents premature water-lipid contact that causes lumping and granulation, while ensuring proper emulsion formation and stability.
Solution Approach 2:
The non-fatty cocoa solids and/or non-fatty milk solids are pre-coated with the first portion of the lipid phase before water is introduced. This preliminary coating creates a protective barrier that prevents direct water-solids contact, avoiding gum formation and lumps, while enabling stable emulsion formation with reduced fat content.
2Strength
If non-fatty cocoa solids and/or non-fatty milk solids are present in the lipid phase, then a snappy texture at cold temperatures is achieved, but the emulsion may become unstable without proper processing
Solution Approach 1:
The non-fatty cocoa solids and/or non-fatty milk solids are pre-coated with the lipid phase before water introduction, creating a stable hydrophobic barrier that maintains emulsion stability while enabling the solids to contribute to snappy texture at cold temperatures without causing instability.
Solution Approach 2:
The emulsion is processed through controlled temperature changes and shear conditions during the two-step lipid phase addition, optimizing the crystal structure of the lipid phase to simultaneously achieve stability and the desired snappy texture characteristics at cold temperatures.
3Device complexity
If the lipid phase is added in one step, then the process is simpler, but the emulsion becomes unstable with large water droplets and phase separation
Solution Approach 1:
The lipid phase addition is divided into two distinct steps with different purposes: the first addition coats the solids and initiates emulsion formation, while the second addition stabilizes the emulsion and achieves final composition. This segmentation prevents the instability and large droplet formation associated with single-step addition.
4Quantity of substance
If chocolate products have reduced fat content, then calories are reduced, but the product loses its characteristic snap and becomes softer
Solution Approach 1:
The emulsion combines reduced fat content with non-fatty cocoa solids and/or non-fatty milk solids that are pre-coated with lipid phase, creating a composite structure that maintains the snappy texture characteristic of traditional chocolate while achieving reduced fat and calorie content.
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 resulting emulsion is stable, has a hard snappy texture at cold temperatures, and avoids water migration, which helps maintain a smooth texture and extends shelf-life.
Implementation Method 1
a stable emulsion of an aqueous phase in a lipid phase wherein non-fatty cocoa solids and/or non-fatty milk solids are present in the lipid phase
Implementation Method 2
the lipid in the lipid phase being crystalline
Data Source
AI summary
The present invention relates to a stable emulsion of an aqueous phase in a lipid phase wherein non-fatty cocoa solids and/or non-fatty milk solids are present in the lipid phase. The present invention further relates to a process for making an emulsion, said process comprising adding the lipid phase in two steps.