The easiest and one of the healthiest ways to make a tasty whey protein shake or meal replacement shake is to make your own shake. Get yourself a decent PLAIN UNFLAVORED Whey Protein Concentrate or Whey Protein Isolate shake or powder. Whey Protein Concentrate usually has around 80 to 81 grams off pure protein per 100 grams, while Isolate has between 90 and 93 grams per 100 grams.
Add between 40 and 50 grams of protein powder, depending on your requirement, (preferably Concentrate before workout and Isolate after workout) in your food blender. This will render between 32 and 40 grams of pure protein when using Concentrate and between 36 and 45 grams of pure protein when using Isolate.
Now add 50 grams of raw uncooked oats or oatmeal in your shake. Oats have about one calorie per gram. Oatmeal is one of the nicest and healthiest carbohydrates, and will result a slow, constant and sustained released energy source.
Add one hand full (roughly 15 - 20 grams) of raisins. Raisins have about three calories per gram. Raisins are an instant source of energy and will be absorbed quick and will also add a nice taste to your unflavored whey.
Add 300 - 400 ml of cold water or cold water and ice. The more ice you add the thicker and "creamier" your shake will be. Another good alternative to water is skimmed milk, and the calcium content in skimmed milk is especially nice for women.
Should you require extra flavoring after adding the raisins you may use Coffee, Milo, Nesquik, Cocoa powder, Cinnamon or Peanut Butter to add to your shake.
You may also add fruits like apple, pear, banana or strawberries. Just watch for the extra amount of Fructose (fruit sugars) in these if you are trying to lose weight.
Another great tip with adding fruits to your shakes is to freeze your berries or bananas. This way they will keep forever and you can add them when you want to according to your taste for the day. Just add the frozen fruits to your shake and you will have a frothy fruit shake with good protein content.