½ gallon ice cream (any flavor)
Cake mix baked according to directions
Cool whip, whipped cream or fluffy whipped frosting
Ice cream topping (to match ice cream flavor, Magic Shell works great)

Make cake mix and pour into a 10 ½ inch spring form pan. Bake 40-45 minutes and remove from oven. Immediately (with pot holders) carefully push the cake down from a rounded surface to a flat surface until the cake surface is leveled.

Cool cake in the freezer until firm.
Mix ice cream in a bowl until it is smooth and pat ice cream on to the firm cold cake. Freeze cake again. Run a sharp knife around the edge of the cake and remove the cake from the pan. Keep the cake on the bottom of the pan and frost with frosting or cool whip and freeze 30 minutes to 1 hour. Frost with a second coating and freeze for 30 minutes. Decorate with topping.