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WHY DOES MILK SPILL WHEN IT IS BOILED?
The recipe now says to add milk.
Snake, you kept the milk to boil?
Snake, look
the milk has boiled and spilt over.
Oh my god!
I totally forgot about the milk
once we started mixing
all the other ingredients for the cake.
What are we going to do now?
First,
Let’s wipe the spilt milk with a cloth.
Come on.
What happened here?
Oh Professor,
It’s my fault.
I did not keep my eye on the milk
and now it has split over.
Professor,
why does milk spill over
when it is boiled?
Milk is made up of water,
protein, sugar and fat.
When you boil milk,
the protein and fat rise to the top
and form a layer of cream.
The water in milk also boils
and comes up as vapour,
but the vapour cannot escape
as it is trapped below the cream.
So when milk becomes hot,
the vapour expands
and forms a thick foam
that pushes the cream aside
to let the trapped water vapour escape.
So the vapour pushes the cream
and the milk spills over.
I get it.
But how do I prevent the milk from spilling?
Simple,
take a wooden spoon and stir the milk.
This way the water vapour
will not get trapped under the cream.
Anyway, for now the milk is fine,
it has not burnt so you can use it.