Rasgulla

Why does the curdling temperature decide the texture?

Milk split at a full rolling boil gives hard, grainy curds, while milk split just below boiling gives soft ones. Take the pan off the flame, wait about a minute, then add the acid slowly. The curds should gather loosely rather than seize into tight lumps. Dropping ice in the moment the whey runs clear stops the residual heat tightening them any further, and that one step accounts for most of the difference between spongy and rubbery.

How long should the chhena drain?

Around half an hour hanging, with moist rather than dry as the target. Chhena squeezed hard or left to hang for hours loses the water the balls need in order to swell in the syrup, and the result is dense. Too wet, on the other hand, and they fall apart as they boil. Press a little between thumb and finger: it should hold its shape without weeping whey.

Why knead it for so long?

Kneading breaks the curd granules down into a smooth paste, so the ball has no seams to split along. Ten minutes with the heel of the hand is not excessive, and the signal to watch for is a faint greasiness on your palm as the milk fat comes out. A ball rolled from under-kneaded chhena shows hairline cracks on the surface, and those cracks open up in the syrup.

Why do my rasgullas turn out flat or hard?

Flat usually means chhena that was over-kneaded or too wet, or syrup that was not at a hard boil when the balls went in. Hard almost always means milk split too hot or chhena pressed too dry. A crowded pan does it as well, since each ball doubles and needs room and enough syrup to move about in. Keep the lid on so the steam works on the tops at the same time.

What syrup consistency does a rasgulla need?

Thin, nowhere near thread stage, which is the opposite of what a fried sweet wants. A one-thread syrup is too concentrated and pulls water out of the balls instead of letting it in, and that is what tightens them. The ratio here is roughly one part sugar to three parts water, and if it thickens as it boils, splash in hot water to bring it back. Gulab jamun works the other way round and is worth comparing on this point alone.

How should they be stored?

In their syrup, refrigerated, for four to five days, and they go on drinking it as they sit, so they taste sweeter on the third day than on the first. Draining a ball on a spoon before eating leaves a fair amount of that sugar behind, which matters more than people assume when Indian sweets are compared. They do not freeze; the sponge collapses on thawing. The same chhena, kneaded and cooked differently, becomes sandesh, and how milk proteins behave under acid and heat is the subject of the dairy nutrition course.