Freeze drying a frozen foam of coffee concentrate

Process for preparing freeze dried soluble coffee, which comprises adding inert gas to a concentrated aqueous extract of roast coffee having a solids content of about 25% to 60% by weight to provide a foam, freezing the foam to a solid mass, grinding the frozen foam to particles having a size of about 0.25 to 2.0 mm and freeze drying said particles to form freeze dried particulate soluble coffee, the amount of inert gas added to the aqueous extract being such as to provide said freeze dried soluble coffee with a density between about 0.2 and 0.3 gm/cc.