How to Make It
Preheat oven to 325°F. Stir together brownie mix, water, oil, flour, and eggs in a medium bowl until well combined. Pour batter into a greased 8-inch square baking dish. Bake in preheated oven until a wooden pick inserted in center of brownies comes out clean, 45 to 50 minutes.
Let brownies stand at least 15 minutes. Cut into 9 squares. Top each brownie with 1/3 cup ice cream.