Vanilla Ice Cream Cake

Ingredients
4 cups birthday cake-flavored ice cream or flavor of your choice, softened if necessary
1 funfetti cake mix (regular size)
1 carton (8 ounces) frozen whipped topping, thawed
Sprinkles
Directions
Line a 9-in. round pan with plastic wrap. Spread ice cream into pan. Freeze 2 hours or until firm.
Prepare and bake cake mix according to package directions, using two 9-in. round baking pans. Cool in pans 10 minutes before removing to wire racks to cool completely.
Using a serrated knife, trim tops of cakes if domed. Place 1 cake layer on a serving plate. Invert ice cream onto cake layer; remove plastic wrap. Top with remaining cake layer. Spread whipped topping over top and side of cake. Decorate with sprinkles as desired. Freeze 2 hours longer or until firm

Vanilla Ice Cream Cake Tips
Can you make your own frozen whipped topping for vanilla ice cream cake?
You can make your own
whipped topping to serve alongside any ice cream cake. However, frozen whipped topping is a different story. Make sure you know the difference between 
whipped cream and frozen whipped topping
: Frozen whipped topping relies on a process of emulsifying water, hydrogenated vegetable oil and high-fructose corn syrup, which could be tough to replicate at home. So, we'd suggest sticking with store-bought frozen whipped topping for this recipe.
How long should you let the ice cream soften?
We recommend popping your ice cream in the fridge for about 20 minutes to soften. It will soften much more evenly than in the microwave or sitting at room temperature