Add 300g of mango pulp and 240g of cold plain yogurt to your blender jar.
Add 1 tablespoon of sugar (if using) and 1/8 teaspoon of freshly ground green cardamom powder.
Pour in 60ml of cold milk or water to help the blades process the thick mixture smoothly.
Secure the lid and blend on high speed for 30 to 45 seconds until you see a completely smooth, sunny-yellow mixture with no lumps.
Taste the lassi. If it is too thick, add the remaining 60ml of cold milk or water and blend for another 10 seconds.
Pour into chilled glasses, garnish with a pinch of saffron or chopped pistachios, and enjoy cold.