I make these all the time and they are wonderful and filling. Add 3/4 cup of quick oats (more or less depending on the desired texture), a cup or so of milk, a banana, and about two ice cubes. I will often add peanut butter as well, and it may also be good to add a scoop of protein powder. Grind thoroughly (less thoroughly if you want chunkier oatmeal).
YUM! Get your cookie fix without the guilt - Oatmeal Cookie Protein Shake ½ C. oats 2 scoops Vanilla protein powder Herbalife ¼ C. Greek yogurt 1 tsp. cinnamon 1 Tbsp. nutella or hazelnut spread 2 C. skim milk or almond milk