Line bottom micro proof baking dish with waxed paper.
Prepare cake batter as directed on package.
Pour into prepared baking dish.
Cook on 50, 5 minutes.
If cake seems to be rising unevenly, rotate dish one-quarter turn.
Cook on HI, 2 to 2 1/2 minutes, or until cake tests done.
Let cool in pan 3 to 5 minutes before inverting cake onto serving plate.
Carefully peel off waxed paper.