Granny Smith is a trash tier Apple. The skin is inedible and it is absurdly sour. It's only edible if you peel the skin, cut it up, ...and bake it in something else. Alternatively peel the skin, and dip it into something such as peanut butter. By itself, it's trash tier.
I don't like them by themselves, but I love them with other food. For example, with a nice nutty cheese and maybe some fig jam. The sourness can be perfect with a sweet counterpart.
