Place all of the ingredients but ice in a blender: almond milk (start with 1/2 cup if you’re using fresh banana, since it will blend up more liquids than frozen), orange juice, mango, and banana.
Blend until smooth. Add more almond milk for a thinner consistency or more mango pieces or a few ice cubes for a thicker consistency. Enjoy immediately.
Notes
TO STORE: Leftover smoothies can be stored in an airtight container in the refrigerator for up to 1 day.
TO FREEZE: Freeze smoothies in airtight, freezer-safe jars for up to 3 months. Let thaw overnight in the refrigerator before enjoying.