Fun Fact:
God of War's Grýla was based on a real giantess from Norse mythology.
In myth, she's not actually related to Angerboda at all, but the game got a lot of other things right. Like how she's enormous, absolutely disgusting and she did still have a cauldron you didn't want to end up in. Sagas from 13th century Iceland describe Grýla as a parasitic beggar woman who wanders around town, asking peasant farmers to give her their disobedient children. The parents could easily turn her away, but if their kid had been a real tachrán lately, they might just give him/her up. When Grýla was given a child, she'd throw them in a sack attached to one of her 15 tails, then take them home, toss them in the cauldron and get a stew going. Legend says that the naughtier the kid, the better the stew tasted and that she never ever had a shortage of food.
In God of War, she's not exactly nice to Angerboda, but she's never so horrible as to try and eat her. Instead, she uses her cauldron to harvest the souls of animals she traps around Jotunheim.
Compared to her mythology, her God of War counterpart is actually kind of nice...