[header] How to make a breakfast smoothie [title] Pulse ¼ cup (25 grams) of rolled oats into blender until finely ground. [step] You are looking for something that looks like flour. For extra nutrients, add 1½ teaspoons (7.5 grams) of dried chia seeds. 
If you don't like chia seeds, consider a protein powder instead. You can use all sorts of varieties of protein powders, from hemp-based to brown rice.