Sheet Pan Brownies

1 small box instant chocolate pudding
1 (18.25 ounce) box chocolate cake mix
1 (12 ounce) package semisweet chocolate chips
2 cups milk

Heat oven to 350 degrees F. Grease a 15 x 10-inch jellyroll pan.

Prepare the pudding as directed on package. Immediately add the cake mix (powder) it will be thick. Stir in the chips. Spread batter in prepared pan.

Bake for 25 minutes.

Cool, then sprinkle with confectioners' sugar or frost with chocolate icing, if desired.