Lab Notes

Every cheese making question we are asked, answered. If your question is not here, email hello@thecheeselab.co.uk and we will add it to the notes.

Before you start

Which milk should I use?

Fresh whole milk from the supermarket. Never UHT or long-life milk: the ultra-heat treatment changes the proteins so the curds cannot form properly. Pasteurised is fine. Unhomogenised gives a slightly better yield but is not required.

Do I need special equipment?

A large pan, a colander and your kit. The Signature Series and Full System include the thermometer and moulds; for the Starter Series you also need a kitchen thermometer.

Are the kits suitable for vegetarians?

Yes, all of them. The rennet is a vegetarian microbial rennet.

Can I use lactose-free or plant milk?

Lactose-free dairy milk works for most recipes. Plant milks do not contain casein, the protein that makes cheese possible, so they cannot work with these kits.

How long does it take to make cheese at home?

Most fresh cheeses take about an hour. Pressed cheeses like halloumi take an afternoon.

Curds and setting

What should I do if my cheese doesn't set?

Diagnosis in order: 1) UHT milk (the most common cause; start again with fresh whole milk). 2) Temperature too far off the recipe (re-check with the thermometer). 3) Rennet added to liquid that was too hot, which kills the enzyme. If none of these fit, email us and we will work it out with you.

Why is curdling part of cheese making?

Curdling is the point: cheese is controlled curdling. The skill is separating clean curds from whey at the right temperature and acidity, which is what the recipes control.

My curds are tiny and grainy instead of one soft mass.

The milk was probably too hot when the rennet went in, or it was stirred too soon after adding rennet. Let it set undisturbed next time.

What is the role of rennet in cheese making?

Rennet contains enzymes that knit milk proteins into a solid curd. Acid-set cheeses (ricotta, paneer) use citric acid or lemon juice instead; rennet cheeses set firmer.

Mozzarella and stretching

Why didn't my mozzarella stretch?

The curd's acidity or temperature is off. Stretch happens in a narrow window: curd at roughly 60 to 70C in hot water, worked gently. Too cool and it tears, too hot and it dissolves. Reheat the water, give the curd a minute longer, and try again: curd is forgiving.

Which kit is best for making mozzarella?

All three make mozzarella. The Starter Series is the cheapest way in; the Signature Series adds the no-microwave method.

Can I make burrata at home, really?

Yes. Burrata is a mozzarella shell filled with cream and curd scraps. It is easier than its reputation, and the recipe walks you through the fold-and-seal.

Halloumi and pressed cheeses

Can I make halloumi at home?

Yes, with the Signature Series or Full System. It is a pressed, cooked-curd cheese: firmer steps, bigger payoff. It grills and squeaks like the shop-bought kind.

Why does halloumi squeak?

The cooked curd holds a tight protein network that rubs against your teeth. Squeak is a sign you did it right.

Storage and using your cheese

How do I store my homemade cheese?

Fresh cheeses keep 3 to 5 days in the fridge in an airtight container. Cheeses stored in brine (halloumi, feta styles) keep 2 weeks or more. None of them are meant to age for months: eat them fresh, that is the point.

Can I freeze homemade cheese?

Halloumi and paneer freeze well for up to 3 months. Soft fresh cheeses lose their texture when frozen.

Which cheeses melt best for cooking?

Mozzarella and cheese curds melt and stretch. Halloumi and paneer hold their shape when cooked, which is why they fry and grill so well.

Is homemade cheese cost-effective compared to shop-bought?

For fresh speciality cheeses like burrata, yes, clearly: a supermarket burrata costs more than the milk to make two. The real reason people make cheese is freshness and the fun of it.

Kit contents and shelf life

How many batches can I make from a kit?

Multiple batches per kit; the limiting ingredient is usually the rennet. Replacement sachets are cheap and available from us.

What is the shelf life of the kit?

24 months from packing, with the best before date printed on the box. Store it cool and dry.

Are there allergens in the kits?

The Starter and Signature Series contain no major allergens. You add the milk yourself. Full ingredient lists are on every product page.

When it still will not work

Follow the recipe and the kit will work. If it does not, we will diagnose it with you, replace ingredients free, and if we still cannot get you there, replace the kit. See our guarantee.