Well, to start off, you mix our Protein Porridge with hot water and our regular Protein Muesli with milk. But you can mix the bircher Protein Muesli with either one! Totally up to you. Also, the consistency of each product is a bit different. Try them all to see which one‘s your favorite! Also, if you‘re allergic to soy, this is our first soy-free Protein Muesli.