Preheat your oven to 350°F (175°C) and prepare the chocolate cake mix according to the package instructions. Pour the batter into a greased 9x13-inch baking pan and bake for 30-35 minutes, or until a toothpick comes out clean. Allow the cake to cool completely.

Once the chocolate cake has cooled, gently remove it from the pan and place it on a serving platter. Scoop your chosen ice cream into an even layer over the top of the cake.

In a large mixing bowl, combine 1 cup of heavy whipping cream, ½ cup of powdered sugar, and 1 teaspoon of vanilla extract. Whip the mixture on medium speed until soft peaks form, about 3-5 minutes.

Spread the whipped cream layer over the ice cream layer evenly, creating an inviting finish. You can smooth it into decorative swirls or peaks.

Cover the assembled cake tightly with plastic wrap or aluminum foil and place it in the freezer for at least 4 hours, ideally overnight.

Before serving, remove the cake from the freezer for a few minutes to soften slightly. Cut into generous slices and add optional toppings.