Cooks never measure

(...)
She was unable to follow a recipe because she scorned to measure any quantities.
- 'A bit of this, and that - that's what I take,' she said, 'That's the way my mother did. Cooks never measure'.
(...)

Unfinished Portrait
Mary Westmacott (aka Agatha Christie)
The Mary Westmacott Collection - Volume I
HarperCollins