Crumb colour differences between formulations were larger
than crust colour changes. As the crumb does not reach temperatures
as high as the crust, the Maillard reaction and caramelisation
do not occur. For this reason, crumb colour was more affected by
the colour of the protein source added and hence, carob germ bread
showed the darkest crumb, while pea bread crumbwas the lightest
(L* ¼ 77.40 6.82 and L* ¼ 73.52 5.44 respectively). The
yellowish effect of carob germ also rendered negative a* values in
the crumb of the corresponding bread (results not shown).