Chocolate sauce is a change when cooking (7)

I believe the answer is:

ganache

I'm a little stuck... Click here to teach me more about this clue!

'chocolate sauce' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'a change when cooking' is the wordplay.
'when cooking' indicates an anagram (letters cooked up into a new form).
'a'+'change'='achange'
'achange' is an anagram of 'GANACHE'.

'is' is the link.

Can you help me to learn more?

(Another definition for ganache that I've seen is " chocolate filling".)

I've seen this clue in The Independent.

Want a hint initially instead of a full solution? Install my app