MINNEAPOLIS–(BUSINESS WIRE)–Summer is officially here, and American Dairy Queen Corporation (ADQ) is celebrating the start of the season by throwing it back to 2004 and the “greatest hits” of the era, including the Brownie Batter BLIZZARD® Treat. In honor of the inaugural opening of the DQ® FREEZER, keeper of all the iconic Blizzard Treats ever created, the brand is partnering with musician Ashlee Simpson-Ross to commemorate the year the Brownie Batter Blizzard Treat was first released. “Over