Gather all your ingredients and equipment, including a blender.
Rinse the mixed berries under cold water.
Peel the banana and break it into smaller pieces.
If using, wash the spinach leaves thoroughly.
Add the mixed berries to the blender first.
Add the banana pieces and spinach to the blender.
Pour in the almond milk.
Add honey or maple syrup for sweetness and chia seeds.
Optionally, add ice cubes for a thicker texture.
Blend on high until smooth and creamy.