Place water and Krusteaz Professional Fudge Brownie Mix in mixer bowl. Whisk until well-blended. If using Ready to Bake Brownie batter, pour batter in to a mixing bowl.
Fold in the white chocolate chips.
Scale batter into greased or paper-lined full sheet pan. If using Ready to Bake Brownie Batter, pour batter on to a 1/2 sheet pan and spread with a spatula.
For convection oven, bake at 300°F 27-32 minutes; for standard oven, bake at 350°F 30-35 minutes. Bake Ready to Bake Brownie Batter according to instructions.