The effect of different fibers, added individually or in combination, to improve the functional properties
of gluten-free layer cakes was examined. Soluble (inulin and guar gum), and insoluble (oat fiber) fibers
were used to replace up to 20% of rice flour in gluten-free layer cakes formulation. The incorporation of
fibers increased the batter viscosity, with the exception of inulin. Fiber enriched gluten-free cakes
containing blends of oat fibereinulin resulted in improved specific volume. Significantly brighter crust
and crumb was obtained in the presence of fibers, excepting the crumb of oateguar gum containing cake.
Fibers and its blends increased the crumb hardness; but the smallest effect was observed with the
addition of oat, individually or combined with inulin. Enriched cakes increased significantly their dietary
fiber content, which was connected to the nature of the fibers added. Fibers significantly affected the
in vitro hydrolysis of starch fractions, being the most pronounced effect the decrease in the slowly
digestible starch. Overall combination of oat fibereinulin resulted in better gluten-free cakes.