A grain product comprises flaked grains stabilized in a solid foam matrix that contains no added fat and cohesively binds together the flaked grains. The solid foam matrix has an expanded volume formed by introduction of a gas, which may be formed in situ by evolution of a gas upon reaction of at least one gas-releasing compound with at least one material selected from the group consisting of an acid or an acidic salt when the foam matrix materials are in a fluid state. Another flaked grain product has a density of from 353 kg/m<；3>； to 497 kg/m<；3>； and comprises flaked grain or grains bound together in a solid foam matrix. Methods of making the foam and resulting grain product are additionally described. <；IMAGE>；
