well i think you gotta ask the fairy at the fountain to make the girl who works there big to help you out. i just remembered asking the fairy, its been awhile since that part for me.
I got the fairy living with me and she only asks for offerings, nothing more😔 Developer should remove the inaccessibility to Shadow Curiosities or make bigger doors cause I cant progress
Im doing a a new run because i pretty much beat the game (i was over 3k pounds) and im stuck at that part too. trying to find out how i did it last time
edit: i think you need to get the 2nd cookbook and make the 3 layered cake then give it to the fairy