Perhaps you could thaw them slightly and make this icecream:
australianavocados.com.au/recipes/avocado-and-pistachio-ice-cream
Or put in a smoothie which would make it nicely chilled:
avocado, raspberries, banana, chia seeds, maple syrup, coconut milk and filtered water.
Dairy-free chocolate mousse:
www.taste.com.au/recipes/dairy-free-avocado-chocolate-mousse/33f015f8-5a87-4b9d-a1fc-91f9e04fa72c
As avocados oxidise and go black when exposed to the air for too long I can't see how you could eat these frozen ones just thawed.
Try sprinkling lemon juice on them as that is supposed to help prevent oxidisation.
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