Effect of crumb cellular structure characterized by image analysis on cake softness

Area of Science:

• Food Science
• Materials Science
• Image Analysis

Background:

• Sponge cake softness is linked to its crumb's cellular structure.
• Understanding this relationship is crucial for product formulation and quality.

Purpose of the Study:

• To adapt and evaluate an image analysis method for characterizing sponge cake crumb structure.
• To investigate the impact of cellular structure on mechanical properties and softness.

Main Methods:

• Mathematical morphology-based image analysis adapted from bread crumb studies.
• Preparation of cakes using varied emulsifiers and flour aging times.
• Characterization of crumb mechanical properties and cellular structure (cell size, homogeneity, cell wall thickness, openness).

Main Results:

• Cellular structure, not cell wall firmness, significantly impacts cake crumb Young's modulus.
• Image analysis successfully classified cellular structures based on size, homogeneity, wall thickness, and openness.
• Increased flour aging led to firmer crumbs with coarser, inhomogeneous cellular structures.

Conclusions:

• A fast, automated image analysis tool can quickly assess cake crumb structure and quality.
• Softer crumbs can be achieved by reducing cell size and wall thickness, and/or increasing openness.
• This method facilitates evaluating ingredient and process effects on cake softness.