2 teaspoons cocoa powder
1 teaspoon hot water
1 cup milk
4 tablespoons frozen blueberries
1 teaspoon white sugar
4 ice cubes
Mix together the cocoa powder and water in a small bowl until the cocoa is dissolved.
Place the cocoa mixture, milk, blueberries, sugar, and ice cubes into a blender; cover and blend until smooth, 30 to 45 seconds. Serve cold.