Preheat the oven according to the cake mix instructions. Prepare the cake mix by combining the cake mix, water, vegetable oil, and eggs in a mixing bowl. Mix until smooth.

Pour the batter into a greased 9-inch round cake pan and bake according to package instructions. Once baked, let it cool completely.

Once the cake has cooled, slice it in half horizontally to create two layers.

Place one layer of cake in the bottom of the cake pan. Spread a layer of ice cream on top, then add the second layer of cake.

Spread another layer of ice cream on top of the second cake layer. Cover with plastic wrap and freeze for at least 2 hours.

Remove the cake from the freezer and take it out of the pan. Top with whipped cream and any additional toppings like sprinkles or chocolate sauce.

Slice and serve immediately.