Incorporated with the gum base in admixture therewith may be plasticizers or softening agents, e.g. glycerine, and a flavoring composition which incorporates the mixture of mercapto terpenes and one or more of the oxohydrocarbon derivatives of our invention and, in addition, sweetening agents which may be sugars including sucrose, dextrose and/or artificial sweeteners such as cyclamates or sacchar