[Python] Nest dictionaries within a list into respective dictionaries

I have two lists, animal_list and outer_list. animal_list contains dictionaries within the list. outer_list is just a simple list with exact same elements

animal_list = [{'animal': 'dog', 'color': 'black'},
{'animal': 'cat', 'color': 'brown'}]

outer_list = ['pet', 'pet']


How can I combine the two lists to make a nested dictionary within a single list without overwriting each record since the outer key (outer_list) is the exact same. My desired state below

[
{'pet':{'animal': 'dog', 'color': 'black'}},
{'pet':{'animal': 'cat', 'color': 'brown'}}
]


I've tried the following but it just writes the last value since the outer key 'pet' is the same

attempt_list = []
attempt_list.append(dict(zip(outer_list,animal_list)))

Failed output below
[{'pet': {'animal': 'cat', 'color': 'brown'}}]


I imagine a loop is needed but can't for the life of me figure it out

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