Chocolate Blackout Cake Forgotten Cake, America’s Test Kitchen Note: Be sure to give the pudding and the cake enough time to cool or you’ll end up with runny pudding and gummy cake. Pudding make the pudding the day before. 1-1/4 cups granulated sugar 1/4 cup cornstarch 1/2 teaspoon table salt 2 cups half-and-half 1 cup…