Aspects of the invention relate to beverage compositions, including, for example, concentrated and ready-to-drink formulations sweetened with at least one non-nutritive sweetener and further comprising a bitterant in an amount sufficient to reduce the lingering sweet aftertaste of the non-nutritive sweetener(s). In certain illustrative embodiments, the bitterant comprises gentian. Another aspect of the invention relates to a method that combines a non-nutritive sweetener having a lingering sweet aftertaste with a bitterant to create a mixture such that when the mixture is contained in a beverage, the bitterant is present in an amount sufficient to reduce the lingering sweet aftertaste of the non-nutritive sweetener.