Home Slickdeals Burger King Rewards Members: Free Brownie Batter Shake w/ Any Purchase from... Slickdeals Burger King Rewards Members: Free Brownie Batter Shake w/ Any Purchase from $1 (At Participating Locations) By ARCOM - 17 October 2021 46 0 SHARE Facebook Twitter Go to the deal page: Burger King Rewards Members: Free Brownie Batter Shake w/ Any Purchase from $1 (At Participating Locations)