The best milk for cheesemaking is fresh pasteurised whole milk from the supermarket chiller. The one milk that never works is UHT or long-life milk, and it fails every time, for everyone, no matter how carefully they follow the recipe.
Why UHT milk cannot make cheese
UHT stands for ultra-high temperature. To make milk shelf-stable, it is heated to around 140C for a few seconds. That temperature permanently unravels the whey proteins and welds them onto the casein, the protein that cheese depends on. When you later add rennet or acid, the casein can no longer knit into a proper curd. You get a sad, grainy soup instead of cheese. No technique can rescue it, which is why "check the milk" is the first line in our troubleshooting guide.
What to look for in the shop
- Fresh and pasteurised: ordinary supermarket fresh milk is pasteurised at about 72C, gentle enough to leave the casein intact. It is what we test every recipe with.
- Whole milk: more fat means more yield and a creamier cheese. Semi-skimmed works but gives less.
- Unhomogenised if you can find it: a nice-to-have, not a must. It gives a slightly better curd, but standard homogenised milk works well.
- Goat milk for chevre: fresh supermarket goat milk makes lovely goat cheese. The same UHT rule applies.
What about lactose-free and plant milks?
Lactose-free dairy milk works for most recipes, because the casein is untouched. Plant milks cannot make cheese at all: no casein, no curd, no exceptions. Oat and soy drinks labelled as milk are lovely in tea and useless in a cheese pan.
The two-minute shop check
Buy it from the refrigerated aisle, check the words "fresh" and "pasteurised", avoid anything that lives on an unrefrigerated shelf. That is the whole rule. Armed with the right milk, our Signature Series kit will take you from that bottle to ten different cheeses, and the Lab Notes are on hand if anything looks odd along the way.
Quick answers
Can you use UHT milk for cheese making?
No. Ultra-heat treatment permanently damages the milk proteins so the curds cannot form. Cheese made with UHT milk fails every time. Use fresh pasteurised milk instead.
Do I need raw milk to make cheese?
No. Every Cheese Lab recipe is tested with ordinary fresh pasteurised supermarket milk. Raw milk is not required.
Does whole milk or semi-skimmed make better cheese?
Whole milk. More fat gives a bigger yield and a creamier texture. Semi-skimmed works but produces less cheese.