Bake the Cake: Preheat your oven according to the instructions on the cake mix box or your homemade recipe. Prepare the batter and pour it into a greased 8-inch or 9-inch round cake pan (or two pans for more layers). Bake according to the instructions, and let the cake cool completely.

1. Prepare the Ice Cream: Allow the ice cream to soften slightly at room temperature for 10-15 minutes. Stir gently until smooth and spreadable. If using multiple flavors, combine them into separate layers.
2. Assemble the Ice Cream Cake: Once the cake is cool, remove it from the pan and place it on a cake plate. If desired, slice the cake into two or three layers. Spread a thin layer of chocolate syrup or caramel sauce on the bottom cake layer. Add a layer of softened ice cream, smoothing it evenly over the cake. Repeat the process for additional layers if applicable.
3. Freeze the Cake: Place the cake in the freezer for at least 2 hours to firm up the ice cream.
4. Frost and Decorate: Once the cake is set, frost the top and sides with whipped cream or frosting. Decorate with your choice of sprinkles, chocolate chips, or other toppings.
5. Freeze and Serve: Freeze the decorated cake for 30 minutes to 1 hour for the frosting to set. Remove from the freezer, slice, and serve immediately.