"my adorable" is a correct and usable phrase in written English.
For example, you could use it in the sentence "My adorable cat is the light of my life."
Have I ever mentioned Forrest, my adorable trainer at SoulCycle?
My adorable Foo-Foo is a constant companion.
But Algy got poisoned, then my adorable brown Mungo.
And date requests: "No, thanks, I hardly get to see my adorable husband as it is".
My adorable husband and best friend, thank you for 63 wonderful years.
As an alumnus of MIT I feel proud of my adorable Almamater.
Reactions have been both hilarious (my friends) and adorable (my girlfriend).
Look, my kids are adorable, my husband loves me all the time, and I'm a fantastic cook.
My kids are adorable, my husband is amazing (not perfect, mind you, but we're still in the vicinity of Father's Day, so now's not the time).
I get to come home to my brother's family house and play with my highly adorable funtastic nieces and live semi-lovely.
I wish I still had my cute, adorable cannisters".
