Stable thickener formulations and nutritional compositions having the stable thickener formulations are provided. In a general 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.