Add the bananas, berries, beets, almond milk, and ice cubes into a blender. Cover and blend on high until smooth and creamy. This will take about 2 minutes.
If you need to, add a little water if it's too thick.
Divide the mixture into four glasses and add some chia seeds on top. Garnish with mint if you want. Serve asap.
Notes
Water can be used to cut calories. It will also give the drink a brighter red color. Raw beets can also be used in this recipe, but roasted beets will result in a softer and smoother texture for the smoothie.