I used whole milk for this recipe. Feel free to sub out for low-fat or skim milk.If you are lactose intolerant, I recommend using Lactaid milk.For vegan or plant-based eaters, I recommend soy milk. If you wish to use oat or almond milk, please increase the protein powder serving size to 2 scoops.If you wish to leave out the greek yogurt, please increase the protein powder serving size to 2 scoops.