- To a blender add frozen banana, milk, coconut water, kale, peanut butter, chocolate chips, ice and protein powder, if using. Blend on medium speed until the ice is broken down and the smoothie is frosty, using a damper if the blender needs help. If it seems a bit too thick, add more milk or coconut water to thin. Divide into two 8-ounce glasses to serve.
Note: Freeze banana slices and kale together in baggies for quick smoothies!