Add it all to a blender and blend well until completely smooth. Taste for flavor and add more almond butter and/or ground cinnamon to taste.
Note: the smoothie will become even thicker and more delicious as it sits on account of the oats. For best results, drink 3 to 5 minutes after preparing.
Notes
If you don’t like protein powder, you can skip it and add more chia seeds or more peanut butter, peanut butter powder, or use Greek yogurt in addition to your favorite milk.