01 - Place almond milk, banana, Greek yogurt, and protein powder into the blender.
02 - Add peanut butter, frozen berries, honey or maple syrup if using, ground cinnamon, and ice cubes.
03 - Secure the lid and blend on high for 30 to 45 seconds, or until the mixture is very smooth and creamy.
04 - Taste and add more honey or maple syrup for additional sweetness if desired.
05 - Divide smoothie evenly between two glasses and serve at once.