Milk out of the freezer looks alarming — separated, flecked, thin. Most of the beliefs
about freezing it come from that first impression. Taken one at a time:
“Frozen milk goes off”
No. Freezing pauses; it does not spoil. Milk keeps up to three months
and comes out usable.
The separation is physics, not spoilage: fat and protein partly divide from the water.
A hard shake, or a few seconds with a stick blender, brings it back together.
“You cannot drink it afterwards”
You can, if it was fresh going in. The honest objection is that you will not want to —
the texture is slightly different. In porridge, pancakes, baking, sauces and mash there is
no difference at all.
“Skimmed milk does not freeze well”
The opposite. Less fat means less to separate, so skimmed milk comes back
better than whole, not worse.
“It will not foam for coffee again”
This one is true, and it is the only real limitation. The protein structure changes
permanently and will not hold a tight foam. Keep fresh milk for coffee.
“You can freeze it in the bottle”
Only if the bottle is not full. Milk expands by roughly a tenth and will split a full
container — pour a glass off first, or better, freeze it in 200–250 ml portions,
which is one mug of porridge or one batch of pancakes.
“Thaw it in the microwave”
Do not. Milk heats unevenly and will scald and curdle in spots while the rest is still
frozen. Fridge, overnight, and use within a day.
And milk that has already started to turn
Freezing will not reverse it. But slightly soured milk is exactly what soda pancakes
want, and freezing it for that purpose is entirely sensible.
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