Prepare brownie mix according to package directions
Cut a circle of parchment paper to fit 15" round backing stone. Pour brownie mixture onto parchment paper; spread 14-inch circle. (Do not bake without parchment paper or batter will run off baking stone while baking.)
Bake 15-18 minutes or until brownie is set. Do not over bake
Mix cream cheese, pineapple and sugar until blended.
Spread cream cheese mixture over brownie.