Wash the strawberries thoroughly and remove the stems before cutting them into quarters. Slice the banana into small pieces so it blends smoothly. Measure the remaining ingredients so everything is ready for blending.

Pour the soy milk into the blender first to help the blades move easily. Add the Greek yogurt, sliced banana, strawberries, and cocoa powder. Adding the liquid first helps the blender process the fruit more smoothly.

Blend on high speed for about 45–60 seconds until the shake becomes creamy and evenly blended. If you want a thicker, colder shake, add ice cubes and blend again briefly.

Pour the shake into a tall glass and serve immediately while cold and frothy. For presentation, garnish with a strawberry slice or a light dusting of cocoa powder.