Name: Funfetti Cookie Cake Recipe
Prep time: 15 min
Cook time: 23 min
Total time: 38 min
Cuisine: American
Ingredients: 3/4 cup (168g) unsalted butter, room temperature; 1/4 cup (56g) packed light brown sugar; 1/4 cup (52g) sugar; 1 large egg; 1 tsp vanilla extract; 15.25 oz box Funfetti cake mix; 2 tbsp (16g) all-purpose flour; 1/2 tsp salt; 3–4 tbsp sprinkles; 3/4 cup (127g) white chocolate chips; 1/2 cup (84g) chocolate chips; 1/2 cup unsalted butter, room temperature; 2 cups (230g) powdered sugar; 1/2 tsp vanilla extract; 1–2 tbsp heavy cream; Gel icing color, optional

Print Recipe· 3.8 from 13 reviews

If you’re looking for a dessert that brings pure joy and a burst of color to any gathering, this Funfetti Cookie Cake Recipe is your new best friend. It combines the nostalgic charm of classic funfetti cake mix with the chewy, rich delight of a cookie, all packed into one irresistible cake form. Perfectly soft yet slightly crisp on the edges, and studded with sprinkles and chocolate chips, this treat is guaranteed to brighten up your celebrations or simply make any day feel special. Plus, with a luscious vanilla buttercream piping on top, every bite feels like a festive party in your mouth. Get ready to fall head over heels for this colorful and utterly delicious cookie cake!

Ingredients You’ll Need

The image shows ingredients neatly placed on a white marbled surface for baking. There is a clear plastic bag of Funfetti cake mix positioned at the top left. Next to it on the right is a stick of butter with the label visible. Below the butter are small clear bowls containing salt, vanilla extract, and sugar arranged in a line from left to right. In the middle, there is a larger clear bowl filled with light brown sugar. At the bottom left is a small bowl holding an egg, close to a pile of all-purpose flour on the surface. To the right of the egg are clear bowls filled with chocolate chips, white chocolate chips, and colorful sprinkles arranged neatly. All the bowls are clear and round, with the ingredients showing distinct textures and colors against the white marble background. photo taken with an iphone --ar 4:5 --v 7

Whipping up this Funfetti Cookie Cake Recipe is a breeze thanks to a handful of simple, every-day ingredients that work together to create magic. Each item plays an important role—from the tender crumb provided by the cake mix to the rich, creamy texture from the buttercream.

Unsalted butter (3/4 cup + 1/2 cup), room temperature: Provides creamy richness and helps the cookie cake stay soft yet structured.
Light brown sugar (1/4 cup): Adds a subtle caramel flavor and moisture for chewiness.
Sugar (1/4 cup): Balances sweetness and helps create that classic cookie texture.
Large egg (1): Binds the dough together, keeping everything perfectly fluffy.
Vanilla extract (1 tsp + 1/2 tsp): Enhances the overall aroma and flavor of both cake and frosting.
Funfetti cake mix (15.25 oz box): The heart of the recipe, bringing in that signature colorful sprinkle mix and light crumb.
All-purpose flour (2 tbsp): Gives extra structure to the dough, preventing it from spreading too much.
Salt (1/2 tsp): Balances the sweetness and enhances all other flavors.
Sprinkles (3–4 tbsp): For the joyful pops of color throughout the cookie cake.
White chocolate chips (3/4 cup): Adds creamy, sweet pockets of melty goodness.
Chocolate chips (1/2 cup): Complement the white chips and add a deeper chocolate flavor.
Powdered sugar (2 cups): For the smooth and fluffy buttercream icing.
Heavy cream (1–2 tbsp): Ensures the frosting has the perfect silky consistency.
Gel icing color (optional): For those who want to take their funfetti cookie cake to the next level of festive flair.

How to Make Funfetti Cookie Cake Recipe

Step 1: Prepare Your Baking Pan

Start by preheating your oven to 350°F (180°C) and readying a 9-inch cake pan. Line the bottom with parchment paper to ensure easy removal later, then spray the sides with baking spray. This little prep makes all the difference, giving your cookie cake a smooth release and perfect shape.

Step 2: Cream the Butter and Sugars

In a large mixer bowl, beat the 3/4 cup room temperature butter with both the light brown sugar and sugar until the mixture turns light in color and becomes fluffy. This crucial step, usually 2-3 minutes, sets up the perfect texture — it’s where your cookie cake starts to develop that incredible softness and body.

Step 3: Add Egg and Vanilla

Mix in one large egg and the vanilla extract until combined. This gives your dough structure and brings a lovely depth to the flavor that feels warm and inviting.

Step 4: Combine Dry Ingredients

Add the funfetti cake mix, all-purpose flour, and salt to the wet ingredients, mixing just until everything comes together. Be careful not to overmix here; you want the dough to be cohesive but still thick and tender. Use a rubber spatula to fold until you have a nice dough ball forming.

Step 5: Fold in Sprinkles and Chocolate Chips

Gently fold in your sprinkles along with the white and chocolate chips. These colorful and melty pockets are what make this cookie cake incredibly delightful and beautiful—plus, they add that nostalgic confetti feeling throughout the cake.

Step 6: Shape and Bake

Press your thick cookie dough evenly into the prepared cake pan. For a little extra flair, press some additional white and chocolate chips on top. Bake for 18-23 minutes until the surface looks matte rather than shiny. Be mindful not to overbake—the cake should stay soft inside but hold its shape.

Step 7: Cool Completely and Prepare Buttercream

Allow the cookie cake to cool fully in the pan so it firms up just enough to transfer easily to a plate. Meanwhile, make your buttercream by beating the 1/2 cup butter until smooth, gradually adding the powdered sugar, vanilla extract, and heavy cream bit by bit until you reach a luscious, spreadable frosting. You can even add gel icing color if you want a fun, festive look!

Step 8: Frost and Decorate

Use a piping bag fitted with your favorite tip to create lovely swirls of vanilla buttercream around the outer edge of your cake. This finishing touch is not only beautiful but adds a creamy balance to the light and chewy cookie base.

How to Serve Funfetti Cookie Cake Recipe

A close-up view of a silver metal mixing bowl filled with thick cookie dough. The dough is light beige and contains colorful rainbow sprinkles, white chocolate chips, and dark chocolate chips mixed evenly throughout. A gray spatula with a metal handle rests inside the bowl, partially covered in dough. The bowl is placed on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Sprinkles aren’t just for the inside—add extra colorful sprinkles on top of the buttercream for an eye-popping effect. Fresh berries or edible glitter can also take your presentation to the next level while keeping things playful and beautiful.

Side Dishes

Pairing your funfetti cookie cake with a scoop of vanilla ice cream or a glass of cold milk is classic and unbeatable. If you want to get creative, a dollop of whipped cream or a simple berry coulis makes a great companion, adding freshness that complements the sweetness perfectly.

Creative Ways to Present

Serve your cookie cake on a bright cake stand to make it the centerpiece of any table. Slice it into wedges like a regular cake and garnish each slice with a tiny swirl of buttercream or a sprinkle of extra chips. For parties, you could even individualize the presentation by serving mini versions in ramekins or skillet cookies decorated with piped frosting.

Make Ahead and Storage

Storing Leftovers

This Funfetti Cookie Cake Recipe keeps well if stored in an airtight container. You can leave it at room temperature for about 24 hours; afterward, pop it in the fridge to maintain freshness. Just be sure to bring it back to room temperature before serving since the cookie texture firms up in the cold.

Freezing

If you want to save leftovers for later, you can freeze the cookie cake either frosted or unfrosted. Wrap it tightly with plastic wrap and then foil to prevent freezer burn. When ready to enjoy, thaw overnight in the fridge for the best texture.

Reheating

To revive that just-baked softness, warm individual slices in the microwave for 10-15 seconds. This gives the butter in the cookie a little softening heat, making every bite taste heavenly and fresh all over again.

FAQs

Can I use a different cake mix instead of Funfetti?

While a funfetti cake mix is ideal for the iconic colorful look and flavor, you can experiment with other cake mixes like vanilla or yellow. Just keep in mind the sprinkles are what make this cookie cake uniquely festive.

Is it necessary to use both white and regular chocolate chips?

No, it’s not essential, but combining both adds an enjoyable variety of sweetness and texture. Feel free to use all one kind if you prefer a more uniform chocolate flavor.

How long does the cookie cake take to bake?

Your Funfetti Cookie Cake Recipe should bake between 18 to 23 minutes. Watch for the shiny surface to dull as a sign that it’s perfectly baked.

Can I make this cookie cake gluten-free?

Since this recipe relies on a boxed cake mix and flour, you’d need a gluten-free funfetti cake mix and substitute the flour with a gluten-free alternative to make it safe for gluten intolerance.

What’s the best way to pipe the buttercream?

Using a piping bag fitted with a star tip like the Ateco 844 creates classic, beautiful swirls. If you don’t have a piping bag, you can spread the frosting smoothly with an offset spatula for a more rustic look.

Final Thoughts

This Funfetti Cookie Cake Recipe is pure sunshine on a plate, perfect for bringing smiles and sweetness to any occasion. Its easy preparation, combined with the playful colors and irresistible flavors, makes it a winner every time. I truly hope you enjoy making and sharing this joyful treat as much as I do—go ahead, give it a try and bring a little celebration into your kitchen today!