How to Replace Greek Yogurt With a Non-Dairy Alternative in Smoothies

While whey protein powder is a great way to increase the protein in your smoothie, it can cause bloating or gas if you're not used to it. Tofu is another source of protein, but it's easy to digest and blends up super-creamy; it's the perfect smoothie ingredient. This smoothie that tastes like a vanilla milkshake is made with half a cup of soft tofu.