01 - Place the mixed berries, banana, almond milk, Greek yogurt, and peanut butter into a blender jar.
02 - If using, add honey or maple syrup, vanilla extract, and a handful of ice cubes to adjust sweetness and thickness.
03 - Blend on high speed until the mixture is completely smooth and creamy, stopping to scrape down the sides of the blender as needed.
04 - Taste the smoothie and adjust sweetness with additional honey or thickness with more almond milk or ice cubes, then blend briefly to incorporate.
05 - Pour into glasses and serve right away for the best texture and flavor.