What Is The Name Of This Book?

there was this book that I read in middle school and i don’t remember the name of it. i remember some info from the book. the stuff that I do remember is that it was about this girl who lives with her parents. Her parents sold potions or some type of magic. In one scene of the book the girl goes over this other person’s house and she gets scared of the microwave. the girl says that she knew what microwaves looked like from a book , but she didn’t know they would be that noisy. well thats all i could remember. if anyone know what book this is can you please tell me. thanks