3. Results and discussion
3.1. Batter characteristics
The addition of 50% or less pin-milled pea flour did not modify
the specific volume of sponge batters (Table 1). However, 100%
substitution of the wheat flour by pea flour led to a fall in specific
volume. The same has been reported when wheat flour is
substituted by chickpea flour (Gomez et al., 2008), as chickpeas and
peas are legumes with a high protein content. Wheat-flour
substitution by the thin fraction produced a progressive decrease
in specific volume and in the quantity of air trapped within the
batter. However, substitution by the starch fraction showed no
changes in specific volume, even with 100% substitution.
In layer cakes, wheat-flour substitution by pea flours produced
an increase in specific volume, as observed previously by Gomez
et al. (2008) with chickpea flours. In this case, no differences