When done right, a kale and spinach smoothie is not only healthy, but tastes great! The trick is what else to add. You don’t want to add sugar (like some national smoothie chain restaurants), you want to add other health fruits that sweeten it up while providing more nutrition. I’ve perfected this recipe so that it makes the perfect after-workout power drink! I use the Ninja Smoothie Blender, available on my Kitchen Tools page.