Calculated field to have values "Does not Contain" specific texts

hi team,

Im trying to add a calculated field and fetch 1 where the field "chocolate" doesnt contain texts like "Vanilla" and "Strawberry" with the below formula

IF NOT CONTAINS([chocolate], 'Vanilla') OR NOT CONTAINS([chocolate],'Strawberry')

THEN 1 ELSE NULL end

and its not working and is adding 1 to all the records instead adding 1 to only chocolates apart from vanilla and strawberry.

please help me