DAIRY TECHNOLOGY: CHEESE
Diagram
Paneer and ripened cheese (cheddar) side by side
Paneer
A fresh acid cheese: hot milk curdled with lemon or vinegar, pressed, and eaten the same day.
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Ripened cheese (cheddar)
A rennet cheese: curd set with rennet, salted, pressed, and ripened for weeks or months.
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The core difference
Acid against rennet and time. Paneer never ripens and never melts; cheddar ripens and melts.
Figure 1: Paneer compared with ripened cheese (cheddar). Drawn in our own style from FAO, The Technology of Traditional Milk Products in Developing Countries, 1990, and Gianaclis Caldwell, Mastering Artisan Cheesemaking, 2012, ch. FRESH ACID-COAGULATED CHEESE, p. 141.
Introduction
Paneer and cheddar are both solid cheeses, but they are made by different chemistry and live different lives. Paneer is a fresh cheese eaten the same day; cheddar is a ripened cheese that improves with age.
The core difference is the coagulant and the ripening. Paneer is set by acid, usually lemon juice or vinegar added to hot milk, and it is never ripened, so it stays soft, milky and firm when heated. Cheddar is set by rennet, salted and pressed, then ripened for weeks or months, so it turns firm, sharp and meltable.
Quick comparison
Table 1: Paneer compared with Ripened Cheese (Cheddar)
| Aspect | Paneer | Ripened Cheese (Cheddar) |
|---|---|---|
| Coagulant | Acid: lemon juice, vinegar or citric acid | Rennet enzyme |
| Milk temperature at setting | Hot milk, about 80 to 90 degrees C | Warm milk, about 30 to 32 degrees C |
| Ripening | None, eaten fresh the same day | Weeks to months in a cool ripening room |
| Salt | Usually unsalted, or lightly salted | Dry salt mixed into the curd before pressing |
| Texture | Soft, crumbly, spongy, holds its shape | Firm, smooth to crumbly, slices cleanly |
| Melting | Does not melt, keeps its cubes in hot dishes | Melts smoothly into sauces |
| Flavour | Mild, milky, fresh | Mild when young, sharp and nutty when aged |
| Moisture | High, about 50 to 55 percent | Lower, about 35 to 39 percent |
| Shelf life | A day or two, keep cold | Weeks to months, keeps well |
| Main use | Curries, tikkas, sweets, where cubes must hold shape | Sandwiches, sauces, snacking and cooking |
Scientific explanation
Definition
Paneer is a fresh acid-coagulated cheese made by adding acid to hot milk, collecting the curd, and pressing it into a block. It is not ripened and it contains no rennet.
Ripened cheese, here cheddar, is a cheese set with rennet, salted and pressed, then held to ripen so that enzymes change its flavour and texture over time.
Working principle
Acid coagulation works because adding acid drops the pH of hot milk to the point where casein loses its charge and clots. The heat makes the curd firm and squeezes the whey out, so the block holds its shape even when heated again.
Rennet coagulation works because the enzyme cuts one protein on the casein micelle, so the micelles stick together into a gel at warm temperature. Salt and ripening then let enzymes slowly break the protein down into flavour.
Apparatus
For paneer: a pot, a heat source, a strainer lined with cloth, and a weight for pressing.
For cheddar: a cheese vat, a curd cutter, a cheddaring table, a curd mill, a press, and a ripening room.
Measurement procedure
For paneer, heat the milk to near boiling, add lemon juice or vinegar a little at a time until the curd separates from clear whey, drain the curd in cloth, and press it under a weight until firm.
For cheddar, warm the milk, add rennet, cut the set curd, drain the whey, cheddar the slabs, mill them, mix in dry salt, press into blocks, and ripen at cool temperature.
Factors affecting readings
For paneer, the amount of acid decides the texture: too little acid leaves a soft curd and a low yield, too much makes it hard and sour.
For cheddar, the rennet, the salt and the ripening temperature decide the result: too little salt lets unwanted microbes grow, and warmer ripening speeds the flavour but shortens the keeping time.
Formulas and calculations
The books give no formula for this pair. Yield is found by weighing the cheese against the milk used.
Worked example from weights: Cheese yield (percent) = (Weight of cheese divided by weight of milk) x 100. One litre of milk, about 1.03 kg, giving 0.20 kg of paneer has a yield of 0.20 divided by 1.03, times 100, which is about 19 percent.
Industrial applications
- Paneer: curries and gravies, where the cubes must hold their shape in hot sauce.
- Paneer: tikkas, rolls and sweets such as rasgulla base, where a soft fresh curd is wanted.
- Ripened cheese (cheddar): sandwiches, burgers and snacking.
- Ripened cheese (cheddar): sauces, soups and baking, where it melts smoothly.
- Both: salads and baked dishes, with the choice made on whether the cheese should melt or hold shape.
Advantages and limitations
- Paneer advantage: quick to make at home with no rennet and no ripening, and it holds its shape in hot dishes.
- Paneer limitation: short shelf life and a mild flavour, and it never melts.
- Ripened cheese (cheddar) advantage: keeps for weeks or months, slices cleanly, melts smoothly, and gains flavour with age.
- Ripened cheese (cheddar) limitation: needs rennet, salt, a press and a ripening room, and takes weeks to make.
FAQ
Why does paneer not melt?
Its protein was set by acid at high heat, so the curd is already firm and its protein does not soften and flow the way rennet cheese does.
Can I make paneer with vinegar instead of lemon?
Yes. Any food acid works: lemon juice, vinegar or citric acid. Add it a little at a time until the whey runs clear.
Is paneer the same as cottage cheese?
No. Cottage cheese is a soft fresh cheese with loose curds in cream, while paneer is pressed into a firm block that holds its shape.
Why is cheddar salted but paneer usually not?
Salt in cheddar controls the microbes during ripening and builds flavour over weeks. Paneer is eaten fresh, so it needs no salt for keeping.
Which cheese gives more protein per bite?
Cheddar, because it is drier and more concentrated. Paneer holds more water, so it has less protein per 100 grams.
References and further reading
- FAO, The Technology of Traditional Milk Products in Developing Countries, 1990 (Google Books page read)
- Gianaclis Caldwell, Mastering Artisan Cheesemaking, 2012, ch. FRESH ACID-COAGULATED CHEESE, p. 141 (Google Books page read)
- P. F. Fox, Cheese: Chemistry, Physics and Microbiology, Vol. 2, Springer, 1999 (Google Books page read)
- FTN books on disk: Cheese Technology, Traditional Dairy Products (agrimoon dairy series).
