Heat a pan and add 450 ml milk into it. Let it cook.
In the next step add the remaining 50 ml into a bowl with custard powder and mix until there are no lumps.
When the milk starts simmering the pan add sugar to it and stir until the sugar melts.
Now add the custard powder mixture with one hand and stir simultaneously with another hand.
Stir continuously for 2-3 minutes on low-medium flame.
Once it reaches the perfect consistency switch off the flame.
Now let it cool down and remember to stir occasionally.
Add mango puree into the custard and mix until it blends well.
Next, add chopped mango pieces and mix again.
Transfer it to a serving bowl and garnish it with almond and pistachio flakes.
Refrigerate it for a few hours and serve chilled