Start by gathering and measuring all the ingredients. If you're using fresh oranges, squeeze them using a citrus juicer until you have one full cup of juice. Measure the frozen mango chunks, soy milk, Greek yogurt, and protein powder so everything is ready to blend.

Pour the orange juice and soy milk into the blender first. Then add the frozen mango chunks, Greek yogurt, protein powder, and maple syrup. Adding the liquids first helps the blender move the frozen ingredients more easily and results in a smoother texture.

Blend the mixture on high speed for about 45–60 seconds. The smoothie should become creamy and fully blended with no visible fruit chunks. If you prefer a thicker smoothie, add a handful of ice cubes and blend again for another 10–15 seconds.

Pour the smoothie evenly into two tall glasses. Garnish with a twist of orange peel or a slice of fresh orange for extra aroma and presentation. Serve immediately while the smoothie is cold and creamy.