Casein protein powder is a dairy-based protein that is often described as having a slightly chalky or thick texture and a neutral to slightly milky taste. The flavor of casein protein powder can be slightly bitter if it's not mixed well, but this can be improved by adding sweeteners like stevia, or using flavored varieties like chocolate or vanilla.
Some people find the flavor of casein protein powder to be bland, while others enjoy its mild taste and find it easy to mix into smoothies or other drinks. The flavor can also be masked well in recipes, making it a popular ingredient in baked goods, protein bars, and other healthy snacks. Overall, the taste of casein protein powder can vary depending on the brand, but it's often described as a smooth and neutral flavor that is versatile and easy to incorporate into a variety of dishes and drinks.