French fry crust morphology was linked to crispness using X-ray tomography and texture analysis.
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Greater frying times and higher frying temperatures resulted in a more porous structure.
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A minimum frying temperature is required for noticeable pore formation.
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A higher porosity will generally result in a higher perceived crispness.
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At frying temperatures over 195 °C, sugar degradation results in a more plastic, less crispy crust