Colour was measured using a Minolta spectrophotometer
CN-508i (Minolta, Co., LTD., Japan). Results were expressed
in the CIE L*a*b* colour space and were obtained using the
D65 standard illuminant, and the 2 standard observer.
The hue angle (tan1(b*/a*)) and chroma or intensity
((a*2 þ b*2)1/2) of the cakes’ crumb and crust were calculated.
Colour determinations were made 5*5 times in each cake:
crumb or crust cake colour was checked at five different points
on each cake and every point was measured five times. The
five points were positioned in the centre of the cake and in
the centre of four imaginary sectors in which it was divided
along the diameter.