From the cook book “Are You Hungry To Night” published sometimes in the late fifties 
In context:
Elvis made it famous. He made it part of American folk cuisine. He referred to it as a “peanut butter and ‘nanner sandwich”, and his love for this treat helped to transform this simple delicacy into his signature dish. He loved these sandwiches and would ask that they be prepared for him at all hours of the day and night.
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