Add all of the ingredients to a blender and blend for 30 seconds on high, or until creamy.
Taste and adjust, if necessary. While this green smoothie recipe is exactly how I make mine, you may need to make minor adjustments. For example, if the fruit you're using isn't very ripe, the smoothie won't be as sweet. Add a teaspoon of honey to add some sweetness, if necessary.
Serve the smoothie immediately.
Notes
Expert Tips
Depending on the strength of your blender, you may need to blend the ingredients in the smoothie in stages. To make sure your smoothie is "smooth", blend the spinach and the liquid first, if necessary. Then add in the remaining fruits and blend again. I use a Vitamix blender and have been making smoothies, blending soups, and making nut butters in it for years. It's strong and I use it daily. If your blender is not as powerful, it may take a bit more patience and blending to get a perfect consistency.
If you don't want to use ice, use frozen fruit instead. You can freeze fresh fruits like ripe bananas by peeling them first and keeping them in the freezer. It's a great way to not waste ripe fruit. You can also freeze spinach and kale. Just toss them into the blender while frozen.
If your smoothie tastes a bit "too green", add extra fruit. Bananas, pineapples, mangos, apples, blueberries, and pears are naturally sweet and will add that extra boost of sweetness that your smoothie may need. This way you can avoid artificial sweeteners and processed sugars.
If you have an allergy to blueberries, pineapples, or bananas, or if you're just not a fan you can substitute any fruit with another fruit with a one-to one-ratio.
If you like your smoothies a bit thicker, add additional fruit or ¼ of an avocado. If you like your smoothies a bit thinner, you can add more of the liquid.