01 - Add almond milk, banana, frozen berries, chia seeds, and sweetener to a blender container.
02 - If using optional add-ins, add nut butter, vanilla extract, and cinnamon to the blender.
03 - Blend on high speed until completely smooth and creamy, approximately 45-60 seconds.
04 - Taste the smoothie and adjust sweetness by adding additional sweetener if desired, then blend briefly to incorporate.
05 - Pour into two glasses and allow to sit for 2-3 minutes so chia seeds can swell slightly. Serve immediately.