Steps
1. In a blender, combine the chopped apple, banana, carrot, and halved grapes.
2. Add the butter if using, and pour in the water or coconut water.
3. Blend on high speed until smooth and creamy, adding ice cubes if desired for a colder drink.
4. Taste and adjust sweetness if necessary by adding a little honey or agave syrup.
5. Pour into a glass and enjoy immediately!