Sorry for the lack of detailed description, but there was a book I loved as a child (early 80s).
I can't remember the author or the title sadly, but it was about a girl who had to hide from a magical ice/snow queen. From memory it was set in her garden? She had to make a potion... collecting dew with (I think. ..) the help of some animals (a bird/cat maybe)?
So sorry this is rather scatterbrained.. If this rings any bells whatsoever, please put me out of my misery!!! Thank you! !