Combine Ingredients: In a high-speed blender, combine the frozen mixed berries, spinach, frozen banana, avocado (if using), almond milk, chia seeds (if using), and honey or maple syrup (if using).
Blend: Blend until smooth and creamy. You may need to stop and scrape down the sides of the blender a few times to ensure everything is well combined. If the mixture is too thick, add a little more almond milk until you reach your desired consistency.
Pour into a Bowl: Pour the smoothie mixture into a bowl.
Add Toppings: Get creative with your toppings! Sprinkle granola, fresh berries, shredded coconut, nut butter, or more chia seeds on top.
Enjoy Immediately: This detox smoothie bowl is best enjoyed immediately to prevent the smoothie from melting.