Cold brew, on the planned slate.

What cold brew coffee actually is, and how it is made

Cold brew is defined by its extraction method, not its temperature at the point of serving. You take coarsely ground coffee, combine it with cold or room-temperature water at roughly a 1:8 ratio, and leave it to steep for 12 to 24 hours. No heat. No pressure. No machine doing any of the work. Time is the only input.

At the end of the steep, the grounds are filtered out and you are left with a concentrate. That concentrate can be served as-is over ice, diluted slightly with water or milk, or used as the base for other drinks. Because the extraction happens slowly and without heat, the compounds that are extracted are different from what a hot brew or espresso pulls.

Heat is efficient at extracting everything. That includes the flavour compounds you want, sweetness, fruit, chocolate notes, but also the acidic compounds and bitter oils you do not. Cold extraction is selective: it draws the pleasant compounds first and leaves much of the harsh ones behind. The result is a cup that tastes cleaner, rounder, and naturally sweeter, without any sugar or milk required.

Cold brew vs iced coffee: they are not the same thing

This is the most common confusion, and it matters because the two drinks are fundamentally different in flavour, structure, and behaviour.

Iced coffee is hot coffee poured over ice. You brew it hot, by drip, espresso, or french press, and then chill it immediately by pouring it over ice. The rapid temperature change preserves the acidity and bitterness of the hot extraction. The ice also dilutes the drink as it melts. You end up with something cold, acidic, and progressively weaker as you drink it. The window of when it tastes good is narrow.

Cold brew is brewed cold from the start. The extraction is slow and selective, producing a concentrate with a completely different chemical profile. No ice dilution during brewing. The flavour is stable over hours. It can be served over ice and still hold its structure as the ice melts, because it starts as a concentrate, dilution is actually built into the serving.

Why the bean matters more in cold brew than you'd expect

The bean choice matters more in cold brew than in any other format. Cold extraction does not mask the character of a bean the way a dark roast or a hot, fast pull can; it tends to emphasise it. A flat, poorly graded bean comes out flat and harsh. A good one comes out clean, round, and structured.

The flavour notes a well-graded bean is known for, fruit, chocolate, caramel, are exactly the compounds that cold extraction draws out best. The 12-hour steep is pulling the same notes a skilled barista would highlight in a hot espresso, but in a format that is gentler on the stomach, cooler in delivery, and more forgiving of the time between brewing and drinking.

This is why P.S. Black No. 4 is held to the same standard as the espresso: specialty grade, every lot. The quality logic is identical even though the process is different.

Why India is finally ready for cold brew right now

India's relationship with coffee has always been warm. Literally. Filter coffee in the south, instant in the north, chai everywhere. Cold coffee existed, but it usually meant a sweetened, milky blended drink served in a tall glass at a mainstream coffee chain. That is a dessert, not a daily coffee habit.

What has changed in the last three to four years is the emergence of a genuinely different urban consumer. They have tried specialty coffee, possibly on a work trip to Bengaluru or on a holiday abroad. They have stopped adding sugar to their coffee. They are drinking one to three cups a day. And they are increasingly spending their working hours in environments, co-working spaces, office parks, gyms, university campuses, where the midday heat makes a hot espresso genuinely unpleasant for half the year.

The temperature problem

Ahmedabad runs hot for most of the year, and a hot beverage at 2pm is a commitment many people would rather avoid for much of that stretch. The demand for a cold caffeine fix that is not loaded with sugar and milk is not a niche preference, it is a practical need. Cold brew is the answer that specialty coffee has been building towards in this climate.

The afternoon habit gap

India's coffee culture has been primarily a morning habit. Cold brew has the potential to claim the afternoon. The lower acidity means it is gentler on a stomach that has just had lunch. The concentrated format means the caffeine is there when the 2pm focus dip arrives. The cold serving temperature suits the afternoon heat. Cold brew does not replace the morning espresso, it occupies the afternoon slot that hot coffee never properly owned.

Where the search data points

Search volume for "cold brew coffee India" and related queries has grown significantly in the last two years. The interest is not just in the metros, Ahmedabad, Surat, and Vadodara are appearing in the data as cities where the curiosity is translating into actual searches for where to buy cold brew locally. The supply is not keeping up with the demand signal yet. That gap is where P.S. Black No. 4 will be when the first Pods open.