Stable thickener formulations and nutritional compositions having the stable thickener formulations are provided. In a genera! embodiment the present disclosure provides a stable thickener formulation comprising from about 0.015 % to about 0.05 % by weight of carrageenan and from about 1.2 % to about 4.0 % by weight of starch. The stable thickener formulation can be used in nutritional compositions used to treat a variety of physiological conditions.