Techniques · 3 min read ·
How to Reduce Milk for Kheer, Rabri and Kulfi
How to reduce milk for Pakistani desserts without burning it: the right pot, heat and stirring, how long it takes, how thick it should be for kheer, rabri, kulfi and rasmalai, and shortcuts.
Many of Pakistan’s best desserts start the same way: a big pot of full-fat milk simmered slowly until it’s thick, creamy and slightly caramel-sweet. It’s the basis of kheer, rabri, kulfi, rasmalai and gajar halwa. The process is simple but slow, and the one real risk is burning the milk, which ruins the whole pot. Here’s how to do it well.
What reduction does
As milk simmers, water evaporates and everything else (fat, protein and natural milk sugar) becomes concentrated. The milk thickens, tastes richer and sweeter, and takes on a faint toasty colour as the sugars caramelise slightly. That flavour can’t be faked with cream or condensed milk alone.
The right pot
Use the widest, heaviest pot you have. A wide pot has more surface area, so water evaporates faster. A heavy base spreads heat evenly, so the milk doesn’t scorch in one spot. A thin aluminium pan is the main reason milk burns.
Heat and stirring
- Bring the milk to a boil over medium-high heat, stirring now and then so it doesn’t catch.
- Lower the heat to medium-low once it boils. You want a steady simmer, with small bubbles across the surface, not a rolling boil.
- Stir every few minutes, scraping the bottom and the corners of the pot with a flat spatula. This is the most important step.
- Scrape the sides. As the milk reduces, a layer of cream forms on the sides of the pot. Scrape it back into the milk; it adds richness and texture, especially for rabri.
A trick many Pakistani cooks use: put a clean, flat steel spoon or a small steel plate in the bottom of the pot. It moves with the bubbling milk and helps stop it settling and burning on the base.
How far to reduce
Different desserts need different thicknesses:
| Dessert | Reduce to | Time from 2 litres (approx.) |
|---|---|---|
| Kheer | About two-thirds, with rice | 45–60 min |
| Rasmalai milk | About half | 30–40 min |
| Kulfi | About one-third | 60–75 min |
| About a quarter, thick and grainy | 75–90 min |
Times vary with the pot and the heat, so judge by thickness rather than the clock. Reduced milk thickens further as it cools.
Sugar comes late
Add sugar towards the end of reducing, not at the start. Sugar makes milk more likely to catch and burn, and in rice puddings it stops the rice from softening.
Shortcuts
Reducing milk takes time, and there are honest shortcuts:
- Evaporated milk is milk already reduced by about half. Use it in place of some of the fresh milk to save time.
- Milk powder stirred into fresh milk thickens it quickly. Whisk it in smoothly so it doesn’t lump.
- Condensed milk is reduced and sweetened. A few spoonfuls add richness to kulfi and rabri, but reduce the sugar accordingly.
These won’t give exactly the same flavour as slow reduction, but they’re good on a busy day.
If the milk catches
If you smell burning, stop stirring immediately and pour the milk into a clean pot without scraping the bottom. Most of it will be fine. Taste it; if it tastes smoky, it’s best to start again, as the flavour won’t disappear.
Using the skin
The thick skin (malai) that forms on cooled boiled milk is precious in Pakistani kitchens. Collect it in a jar in the fridge over several days and use it on lassi, in desserts, or to make homemade butter and ghee.
