This study evaluated the quality characteristics of Garaeduk, a traditional Korean rice cake, to which Spirulina (0, 1, 2, 3%, all w/w) was added. Moisture content of Spirulina-containing Garaeduk both before and after cooking increased with Spirulina level. During storage, moisture content was greater in Spirulina-containing cakes compared with control cakes, and the Hunter color L and b values of Spirulina-containing cakes decreased. Textural properties (hardness, chewiness), measured using a texture analyzer, of Spirulina-containing cakes were greater than those of control. During storage, hardness and chewiness of Spirulina-containing cakes remained higher than those of control cakes. The antioxidant activities of Spirulina-containing cakes increased with Spirulina content, owing to increased phycocyanin levels. Amylography showed that peak viscosity, and thus gelatinization temperature, of Spirulina-containing Garaeduk cakes were similar. Sensory preference tests revealed that Garaeduk with 2% Spirulina had the highest scores for color, odor, taste, and overall preference. It is suggested that Spirulina to 2% can be added to Garaeduk to improve quality.