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Keywords:

  • Baking performance;
  • oat β-glucan;
  • oxidation;
  • sponge cakes;
  • TEMPO

Summary

The objective of this study was to investigate the characteristics of sponge cakes containing native oat β-glucan (BG-B) and its oxidised derivative with TEMPO (2, 2, 6, 6-tetramethyl-1-piperidine oxoammonium ion) (Oxi-B). BG-B and Oxi-B were substituted at 1% (w/w) into a formulation, and then the effects of BG-B and Oxi-B addition on the pasting properties of wheat flour and the physicochemical and textural properties of sponge cakes were determined. The pasting parameters of wheat flour were increased by BG-B, whereas they were decreased in wheat flour with added Oxi-B. The cake containing Oxi-B had a lower volume, and a higher symmetry and uniformity than the BG-B cake. The Oxi-B cake exhibited smaller L* and b* values and a higher a* value than the control in crumb and crust colour. According to texture profile analysis, the BG-B cake had increased hardness, chewiness and gumminess, whereas the Oxi-B cake had decreased hardness.