I use an actual blender to blend mine, not a blending cup (those have never worked well for me). This prevents any of the clumpiness that some people have mentioned.I’ve also found that it works best when you mix it with other stuff. I use frozen bananas, peanut butter, and almond milk. It tastes like a milkshake! Most protein powders have some sort of aftertaste if you don’t mix it with anything but water. This is typical. Don’t be silly- just mix it with other stuff! The vanilla flavor will blend really well!I’m vegan and allergic to whey/dairy so I am very pleased with this overall.