Dairy Queen (DQ) is an American chain of soft serve ice cream and fast-food restaurants owned by International Dairy Queen, Inc., a subsidiary of Berkshire Hathaway. ... Serves a variety of frozen products, such as soft serve ice cream and Food DQ is known for its iconic Blizzard, where candy and other delicious toppings like cookies and brownies are mixed into ice cream for a decadent sweet treat. But the first Blizzard didn't hit stores until 1985. That first year, DQ sold more than 175 million of them