Chocolate Chia Smoothie

This smoothie contains frozen berries and kale.  The unsweetened cocoa powder + stevia helps to add a yummy chocolate flavor.  We used blackberries and raspberries because they have the lowest carb count, but if you need a sweeter flavor, try strawberries and blueberries - just make sure to not use too many because strawberries and blueberries have more carbs than blackberries and raspberries,