Funfetti Ice Cream Cake
This Funfetti Ice Cream Cake is the ultimate celebration dessert. Made with a simple boxed cake mix, creamy vanilla ice cream loaded with colorful sprinkles, fluffy Cool Whip, and extra frosting, it's an easy homemade ice cream cake that tastes like it came straight from an ice cream shop.
The secret to creating perfect layers is baking the cake in a brownie pan, cutting it in half, and sandwiching the ice cream layer between the two cake layers. It's simple, fun, and guaranteed to be a hit at birthdays, summer parties, and special occasions.
Why You'll Love This Funfetti Ice Cream Cake
Easy shortcut recipe using boxed cake mix
Perfect make-ahead dessert
Loaded with colorful sprinkles
Great for birthdays and celebrations
No special baking skills required
Creamy, cold, and refreshing
Customizable with your favorite ice cream flavors
What Makes This Ice Cream Cake Special
Unlike traditional layered cakes, this version combines soft Funfetti cake with creamy vanilla ice cream for the perfect texture contrast.
Baking the cake in a brownie pan creates the ideal shape for layering. Once cooled, the cake is cut in half and stacked with a thick layer of sprinkle-filled ice cream in the center.
The Cool Whip and frosting topping adds the perfect finishing touch while making decorating incredibly easy.
Ingredients
For the Cake Layer
1 box Funfetti cake mix
Ingredients listed on the box (typically eggs, oil, and water)
For the Ice Cream Layer
1.5 quarts vanilla ice cream, slightly softened
1/2 cup rainbow sprinkles
For the Topping
1 container Cool Whip, thawed
1/2 cup vanilla frosting (optional)
Additional rainbow sprinkles
Kitchen Tools You'll Need
Brownie pan (approximately 9x13 inches)
Large mixing bowl
Electric mixer or whisk
Offset spatula
Plastic wrap
Freezer-safe container or pan
Sharp knife
Why Bake the Cake in a Brownie Pan
Using a brownie pan instead of traditional cake pans makes assembling this ice cream cake much easier.
The large rectangular cake can simply be cut in half to create two even layers. This method saves time and ensures both cake layers are the same thickness.
It also creates the perfect cake-to-ice cream ratio in every slice.
How to Prepare the Cake
Preheat your oven according to the cake mix package directions.
Prepare the Funfetti cake batter according to the box instructions.
Pour the batter into a greased brownie pan and bake according to package directions until a toothpick comes out clean.
Allow the cake to cool completely.
Prepare the Ice Cream Layer
While the cake cools, allow the vanilla ice cream to soften slightly.
Stir in the rainbow sprinkles until evenly distributed throughout the ice cream.
Place the ice cream back into the freezer if it becomes too soft while mixing.
How to Assemble the Cake
Once the cake is completely cool, carefully remove it from the pan.
Cut the cake evenly in half to create two rectangular layers.
Place one cake half into a freezer-safe dish or pan.
Spread the sprinkle-filled vanilla ice cream evenly over the cake layer.
Top with the second cake layer.
Gently press down to secure everything together.
Freeze Until Firm
Cover the assembled cake with plastic wrap or foil.
Freeze for at least 4-6 hours, or overnight for best results.
The cake should be completely firm before adding the topping.
Add the Cool Whip and Frosting Topping
Once frozen, spread an even layer of thawed Cool Whip over the entire cake.
Add dollops or swirls of vanilla frosting on top.
Finish with extra rainbow sprinkles for a colorful bakery-style appearance.
Return the cake to the freezer until ready to serve.
Tips for the Best Ice Cream Cake
Let the cake cool completely before assembling
Use slightly softened ice cream for easier spreading
Freeze overnight for clean slices
Warm your knife under hot water before cutting
Work quickly when assembling to prevent melting
Fun Variations
Birthday Cake Ice Cream Cake
Use birthday cake ice cream instead of vanilla.
Chocolate Funfetti Version
Use chocolate cake mix with vanilla ice cream.
Cookies and Cream Version
Mix crushed sandwich cookies into the ice cream layer.
Strawberry Celebration Cake
Use strawberry ice cream and pink sprinkles.
Confetti Explosion Cake
Add extra sprinkles between every layer.
Frequently Asked Questions
Can I use a different cake mix?
Absolutely. White, yellow, chocolate, or confetti cake mixes all work well.
Can I make this ahead of time?
Yes. This cake is actually best when made a day in advance.
How long does ice cream cake last?
Store tightly covered in the freezer for up to 2 weeks.
Can I use homemade whipped cream instead of Cool Whip?
Yes, but Cool Whip tends to hold up better in the freezer.
What is the best way to slice ice cream cake?
Run a sharp knife under hot water, dry it, and slice immediately.
Final Thoughts
This Funfetti Ice Cream Cake combines everything you love about birthday cake and ice cream into one easy dessert. By baking a boxed Funfetti cake in a brownie pan, cutting it in half, and layering it with sprinkle-filled vanilla ice cream, you get a fun and festive treat that's perfect for any celebration.
Finished with fluffy Cool Whip, frosting, and extra sprinkles, this homemade ice cream cake is guaranteed to be the star of the dessert table.
