Smoothies have become wildly popular in the past couple of years, and they can be wonderfully delicious with the right combination of ingredients. This smoothie is really tasty, and dropping in a big slice of creamy avocado takes it to a whole new level. It's dreamy, creamy, sweet, and makes for a quick, on-the-go breakfast or snack. Fats are necessary for the absorption of fat-soluble vitamins (vitamin D from the dairy, vitamins A and K from the greens), so avocado serves a dual purpose here. There's a vicious, never-ending competition be[...]