Step 1
Take 5 cups or 1.25 litres of full fat whole milk in a thick bottomed kadai or pan & begun to heat the milk on a low to medium flame, till the milk starts to froth or form a layer of cream/malai on top.
Step 2
So when you will see the cream floating on top, then with a spatula, gently move the cream layer.
Step 3
Bring it towards the side of the pan and stick it to the pan.
Step 4
Keep on simmering the milk like this and collecting the cream layer on the sides.
Step 5
Meanwhile soak almonds and pistachios in hot water for 30 minutes. then remove their peels.
Step 6
Slice or chop them and keep aside. do keep a check on the simmering milk when soaking as well as slicing the almonds, pistachios.
Step 7
This process of collecting the cream layer has to be done many times. continuous simmering of the milk will bring the cream on top and you have to bring & stick it to the sides. in between also stir the milk gently on occasions, so that the milk does not get burnt from the bottom. if you do too much of stirring and if quickly, then you won't get the layers of cream in the rabri. you can also just thicken and scrape the milk solids from the sides like i have done for shahi tukda rabdi. but in this case you won't get the layers of cream or malai in the rabri. but both versions taste good.
Step 8
Once the milk reduces to half, then add 2.5 to 3 tbsp sugar. you can add sugar as per your taste.
Step 9
Then add a 12 to 15 strands of crushed saffron and ½ tsp cardamom powder. stir gently.
Step 10
Continue collecting the cream and bringing it to the sides of the pan. also do stir the milk gently after you bring the cream towards the sides of the pan. if you don't stir the milk then there is a possibility of the milk getting browned or burnt from the bottom.
Step 11
After adding saffron, the color will change gradually to a yellow color as the milk keeps on reducing.
Step 12
When the milk gets reduced to ⅓ or ¼ of its original quantity, then switch off the flame. it took me about 1 hour 15 minutes on a low flame initially and medium flame towards the latter stage.
Step 13
The cream layer will be collected on the sides. scrape off the entire cream layer as well as dried milk solids and add to in the thickened milk.
Step 14
Stir gently. then add the sliced almonds & pistachios and 1 tsp rose water or kewra water. stir gently again.
Step 15
garnish with some sliced almonds and serve rabri hot or warm or chilled.