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Cheese Processing – Ingredients, Steps & Techniques

By PMG Engineering · 27 Jun 2023

1. Overview:

Cheese is one of the most diverse and consumed dairy products worldwide. It can be made from pasteurized or raw milk, with raw milk cheeses requiring an aging period of at least 60 days to meet food safety standards. The cheese production process varies depending on the type—acid cheese, rennet cheese, natural cheese, or processed cheese—each with distinct textures, flavors, and shelf life.

2. Ingredients:

The primary ingredient is milk, sourced from:

Cow
Goat
Sheep
Buffalo

Depending on the cheese variety, other ingredients include:

Acids (acetic acid, glucono delta-lactone) for coagulation in acid cheeses
Rennet (calf or microbial) for enzymatic coagulation
Calcium chloride to improve curd formation
Flavor enhancers: Herbs, spices, sweet/hot peppers, port wine

Most common types of cheese:

3. General steps for cheese processing:

a. Standardization of Milk

Adjusting the fat-to-protein ratio ensures high cheese yield and consistent quality.

b. Pasteurization of Milk

Pasteurization reduces spoilage organisms while improving conditions for starter cultures. In some cheeses, raw milk is used but aged for safety.

c. Cooling down milk

Milk is cooled to 32°C, the optimal temperature for starter culture growth.

d. Inoculate with starter & Non-starter bacterial and ripen

Starter and non-starter cultures are added and held at 32°C for 30 minutes to initiate fermentation, enhancing flavor and reducing pH.

e. Add rennet and form curd

Rennet is added to coagulate milk into a firm curd. This undisturbed curd is the foundation of most cheese types.

f. Cutting of curd and heat

The curd is cut into small pieces and heated to 38°C, helping to expel whey and firm the curd.

g. Drain whey/Use for some other Bi-product

The leftover whey can either be drained from the vat or the whey will be used to make some other bi-product. And the curd forms a mat.

h. Getting Texture and Cutting

Curds are stacked, flipped, and milled into smaller pieces during this cheddaring phase, further reducing moisture.

i. Dry salt or brine

Salt is added either directly to the curd or via brining to enhance flavor and extend shelf life.

j. Formation of cheese into blocks

In this step, pieces of cheese in bulk will be placed into the mold, and with the help of a hydraulic/pressing machine, the block of cheese will be made of the desired shape and size.

k. Storage and Age

This cheese is stored in the coolers until the design age is reached. Depending upon the variety and type of cheese, it can be aged from several months to several years. Usually, it is aged for 12 months.

l. Packaging

Aged cheese is packaged under hygienic conditions, following food safety standards and ensuring market readiness.

4. Conclusion

Cheese manufacturing is a complex yet rewarding venture. From understanding the role of milk standardization to precise fermentation and aging techniques, every step must align with food safety regulations and product quality goals.

The same process allows for endless variations—herbed, spiced, or smoked cheeses—opening up opportunities in food business consultancy and product diversification. With proper planning, infrastructure, and expert guidance, cheese production can be a profitable segment in the dairy industry.

5. Reference:

Frequently asked

Can we use raw milk for cheese instead of pasteurized milk?

Cheese can be made from either pasteurized or raw milk. If raw milk is used, the cheese must be aged for at least 60 days to meet food safety standards. Pasteurization reduces spoilage organisms and improves conditions for starter cultures, which is why many plants prefer it. The choice affects your ageing room capacity and storage planning, so decide it at the concept stage.

Why is milk standardization done before cheese making?

Standardization adjusts the fat-to-protein ratio of the milk before processing. In cheese manufacturing this is what ensures high cheese yield and consistent quality batch after batch. Without it, yield and texture drift between production runs, so standardization is treated as the first controlled step in the general cheese process line, ahead of pasteurization and cooling.

What temperatures do we need to hold during cheese processing?

Two temperatures govern the core of cheese processing. After pasteurization the milk is cooled to 32°C, which is the optimal temperature for starter culture growth, and the inoculated milk is held at 32°C for 30 minutes to begin fermentation. Later, after the curd is cut, it is heated to 38°C to expel whey and firm the curd.

Which ingredients besides milk do we need to budget for?

The primary ingredient is milk from cow, goat, sheep or buffalo. Depending on the cheese variety you also need acids such as acetic acid or glucono delta-lactone for coagulation in acid cheeses, rennet (calf or microbial) for enzymatic coagulation, calcium chloride to improve curd formation, and flavour enhancers such as herbs, spices, sweet or hot peppers and port wine.

What happens to the whey after the curd is formed?

Once the curd is cut and heated to 38°C, whey is expelled. It can either be drained from the vat or diverted to make another by-product, which is a decision worth taking early because it affects layout and utilities. After draining, the curd forms a mat that then goes through the cheddaring phase of stacking, flipping and milling.

How long does cheese need to be aged, and what does that mean for storage design?

After the cheese is pressed into blocks, it is stored in coolers until the design age is reached. Depending on the variety and type, ageing ranges from several months to several years, and is usually around 12 months. This directly sizes your cooler capacity, since a 12-month hold means a large volume of product is in storage at any given time.

CITE THIS

PMG Engineering. (2023). Cheese Processing – Ingredients, Steps & Techniques. PMG Engineering. https://pmg.engineering/Article/196/cheese-processing-ingredients-steps-techniques/

https://pmg.engineering/Article/196/cheese-processing-ingredients-steps-techniques/