Abstract: A grain product is provided that contains 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. Preferably, the gas-releasing compound is a leavening agent or virtually any chemical compound that, by reaction with another compound, results in the evolution of a gas in a sufficient amount to form the desired liquid foam that can be dried or cured to form a solid foam matrix. The flaked grain product typically having a density in the range of from about 22 lb/ft3 to about 31 lb/ft3.