Take a heavy bottomed pan and add 2 tbsp of water and full fat milk. Put the heat on high.
When the milk begins to boil, lower the heat. Mix arrowroot powder in 1/4th cup of water and mix well to no lumps.
Pour this slurry to the milk while steering continuously
Allow the milk to simmer while scrapping the sides occasionally because malai will keep on sticking to it
In about 40 - 45 minutes when the milk will reduce to half. Ie 500 mL add saffron and sugar
Let the milk simmer for more 8-10 minutes or until milk turns creamy in texture
Remove the pan from the heat. Add cardamom powder and chopped nuts. Mix well.
In the mean time, peel, deseed and chop the oranges finely. Keep aside.
Once the milk has cooled down, add the chopped oranges and orange zest in the milk.
Give it a good mix
Place the orange kheer in the refrigerator. Garnish with rest of the crushed dryfruits and serve chilled.