Prior to the introduction of the Blizzard in 1985 , Dairy Queen served conventional '' thick '' milkshakes , in traditional flavors such as vanilla , chocolate , and strawberry , with or without added malt on request .
Prior to the reintroduction of the Blizzard in 1985 , Dairy Queen served conventional '' thick '' milkshakes called '' Blizzards '' in the 1960s . 
 These were served in traditional flavors such as vanilla , chocolate , and strawberry , with or without added malt on request .