A free-flowing cellulosic substrate, such as rice hulls, can be impregnated with desired liquid flavoring agents to create a free-flowing flavoring composition for brewed beverages such as coffee and tea. The flavoring composition can be added to ground roasted coffee or prepared tea leaves in a brew filter device such as a paper filter, French press, percolator, vacuum pot or any other mechanical filtering device intended to brew coffee or tea. The flavor-impregnated substrate will release the desired flavors in contact with water during the brew process, imparting flavor to the finished coffee or tea beverage.
