The black, foul-smelling cigars which the boy’s Norwegian Grandmamma smokes represent how different she is from the book’s other female characters. The Witches presents women, generally, as helpless at best and actively dangerous at worst. Mrs. Jenkins isn’t a very good mother to Bruno, and she’s terrified of mice even though they’re largely harmless. Witches, demonic creatures whose one purpose in existence is to kill as many children as possible, pose as women. They’re dangerous and terrifying in part because they pretend to be harmless even though they’re not. In contrast, the book celebrates the boy’s Grandmamma as a wise, caring, and resilient woman, even as it works hard to distinguish her from other female characters. It does this through her age and physical appearance (unlike the Grand High Witch, Grandmamma looks as old, fat, and wrinkly as she actually is) and through the masculine-coded cigars that she smokes—a habit none of the other female characters in the book shares.
Cigar Quotes in The Witches
My grandmother was tremendously old and wrinkled, with a massive wide body which was smothered in grey lace. She sat there majestic in her armchair, filling every inch of it. Not even a mouse could have squeezed in to sit beside her. I myself, just over seven years old, was crouched on the floor at her feet, wearing pyjamas, dressing-gown, and slippers.
[…]
My grandmother was the only grandmother I ever met who smoked cigars. She lit one now, a long black cigar that smelt of burning rubber.

