Name: Confetti Birthday Cake (Funfetti) Recipe
Prep time: 30 min
Cook time: 28 min
Total time: 4 h 58 min
Cuisine: American
Ingredients: 3 and 3/4 cups (443g) cake flour, spooned & leveled; 1 teaspoon baking powder; 1 teaspoon baking soda; 1 teaspoon salt; 1 and 1/4 cups (282g) unsalted butter, softened to room temperature; 2 cups (400g) granulated sugar; 1/3 cup (80ml) vegetable oil; 4 large eggs, at room temperature; 2 large egg whites, at room temperature; 3 teaspoons (15ml) pure vanilla extract; 1 and 1/2 cups (360ml) buttermilk, at room temperature; 3/4 cup (135g) rainbow sprinkles; 1 and 1/2 cups (340g) unsalted butter, softened to room temperature; 5 and 1/2 cups (650g) confectioners’ sugar; 1/3 cup (80ml) heavy cream, at room temperature; 3 teaspoons (15ml) pure vanilla extract or clear imitation vanilla extract; 1/8 teaspoon salt; optional: additional sprinkles for garnish

Jump to Recipe· 4.1 from 55 reviews

If you’re looking to sprinkle a little joy into your celebrations, this Confetti Birthday Cake (Funfetti) Recipe is an absolute showstopper that will delight both kids and adults alike. Imagine a moist, fluffy cake bursting with colorful rainbow sprinkles baked right into every bite, all frosted with a smooth, creamy vanilla buttercream that’s as luscious as it is beautiful. This recipe perfectly blends simple ingredients and a straightforward process to deliver a festive, crowd-pleasing cake that’s not only fun to make but impossible to resist. Whether it’s a birthday party or just a day that needs a splash of color, this Confetti Birthday Cake (Funfetti) Recipe will become your new go-to dessert that spreads smiles and sweet memories.

Ingredients You'll Need

A top-down view of multiple baking ingredients neatly placed on a white marbled surface. There are two clear glass bowls filled with white sugar and cake flour, the sugar bowl positioned in the upper left and the cake flour bowl centered and larger. Four brown eggs lie clustered in the middle. To the right of the eggs, a clear glass bowl holds transparent egg whites. Below the egg whites, there are three light yellow butter sticks slightly overlapping. A small clear bowl with dark brown vanilla extract sits near the bottom left center, while two very small clear bowls contain white baking powder and white baking soda below the vanilla. There is another small metal bowl with salt to the left. A clear bowl filled with colorful sprinkles is placed at the bottom left. At the bottom right, a glass measuring cup holds white buttermilk, and nearby an orange bowl contains light yellow oil. Each ingredient has a plain white label with black text naming it. Photo taken with an iphone --ar 4:5 --v 7

For this Confetti Birthday Cake (Funfetti) Recipe, you'll notice that the ingredient list features straightforward basics that come together to create the perfect texture and flavor. Each component plays a crucial role: from the cake flour that ensures a tender crumb, to the buttermilk that adds moistness and tang, and of course, those vibrant sprinkles that make the cake pop with festive fun.

Cake flour: Use spooned and leveled cake flour for a soft, tender crumb with professional results.
Baking powder, baking soda, and salt: These leavening agents and seasoning ensure your cake rises beautifully and tastes balanced.
Unsalted butter: Softened to room temperature, it provides richness and helps with the creamy frosting texture.
Granulated sugar: Adds sweetness and helps create the lovely, fluffy texture during creaming.
Vegetable oil: Adds moisture and keeps the cake delightfully tender.
Eggs and egg whites: Room temperature ingredients that ensure structure and richness while keeping the cake light.
Pure vanilla extract: Adds a warm, fragrant depth to both the cake and frosting flavors.
Buttermilk: Adds acidity which reacts with baking soda to create a tender, moist cake with a subtle tang.
Rainbow sprinkles: The defining party element that gives the cake its signature festive confetti look.
Confectioners’ sugar: Sweetens the frosting while contributing to the creamy texture.
Heavy cream: Helps thin the frosting perfectly so it spreads beautifully.
Salt: Just a pinch balances out the sweetness and brightens flavors.
Optional sprinkles for garnish: Because you can never have too much confetti on your birthday cake!

How to Make Confetti Birthday Cake (Funfetti) Recipe

Step 1: Prepare Your Pans and Preheat

Start by preheating your oven to 350°F (177°C), and grease three 8-inch or 9-inch cake pans. Line them with parchment paper rounds and grease the paper as well to ensure your cake layers will release easily, leaving you with smooth, perfect rounds to stack up.

Step 2: Mix the Dry Ingredients

Whisk together cake flour, baking powder, baking soda, and salt in a large bowl. This dry mix is essential to evenly distribute the leavening and seasoning throughout the batter.

Step 3: Cream Butter and Sugar

Using a mixer fitted with the paddle attachment, beat the softened butter and sugar on high speed for five minutes until light, fluffy, and pale in color. This step creates the airy base that helps give the cake its tender texture.

Step 4: Add Oil, Eggs, and Vanilla

Mix in the vegetable oil for extra moisture, then add in the eggs, egg whites, and vanilla extract, beating until everything is fully combined and smooth. Be sure to scrape down the bowl to keep your batter uniform.

Step 5: Combine Dry Ingredients and Buttermilk

Add the dry ingredients and buttermilk in three gradual additions, mixing gently after each just until incorporated — over-mixing will toughen the cake. Now fold in your rainbow sprinkles carefully to keep them from bleeding color into the batter.

Step 6: Bake the Cake Layers

Pour the batter evenly into your prepared pans and bake for 25 to 26 minutes (or slightly longer for 8-inch pans). Tent the cakes with foil after 15 minutes to prevent over-browning. Test for doneness with a toothpick, which should come out clean when inserted in the center.

Step 7: Cool the Cakes

Let the cakes cool in their pans on wire racks for 20 minutes, then run a knife around the edges and remove from pans to cool completely on racks. Completely cooled layers are critical for excellent frosting adhesion and a clean finish.

Step 8: Make the Frosting

Beat softened butter until creamy, then add confectioners’ sugar, heavy cream, vanilla, and salt. Beat on low speed first, then high until fluffy and smooth. Adjust thickness with extra sugar or cream as needed for spreading perfection.

Step 9: Assemble and Crumb Coat

Slice a thin layer off the tops of the cakes to level them. Place a layer on your plate or stand, spread about a cup of frosting on top, then repeat with the next layer. Apply a thin crumb coat over the entire cake and chill for at least 30 minutes to set.

Step 10: Final Frosting and Garnish

Spread remaining frosting evenly over the cake and decorate with extra sprinkles if you want to up the party vibes. Now your Confetti Birthday Cake (Funfetti) Recipe is ready to impress!

How to Serve Confetti Birthday Cake (Funfetti) Recipe

The image shows a round, two-layer white cake covered with smooth white frosting. The frosting has swirled textures all around the cake. Colorful small round sprinkles in red, blue, yellow, pink, and green cover the top and sides evenly. Five lit thin gold candles are placed on top, slightly spaced out. The cake sits on a white marble cake stand with a wooden base, set against a pale pink background. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

Extra rainbow sprinkles are a must for this cake’s signature look, but consider adding edible glitter or tiny sugar stars to elevate the sparkle. Fresh berries or a drizzle of white chocolate could add unexpected bursts of flavor and color, making every slice even more exciting.

Side Dishes

This fun and sweet cake pairs beautifully with a scoop of vanilla ice cream or creamy whipped cream. For a brighter contrast, a fresh fruit salad with citrus notes or tangy berries will balance the richness of the buttercream and add a refreshing element to your celebration table.

Creative Ways to Present

To take your Confetti Birthday Cake (Funfetti) Recipe from simple to spectacular, try stacking mini cupcakes alongside the cake for a fun dessert spread, or serve cake slices layered with colorful macarons on top. You can also experiment with funfetti cake pops made from leftover crumbs and frosting, perfect for party favors or an interactive dessert station.

Make Ahead and Storage

Storing Leftovers

Once frosted, cover your Confetti Birthday Cake (Funfetti) Recipe tightly and store in the refrigerator for up to 5 days. Using a cake carrier is ideal to protect the frosting from drying out and to keep those sprinkles perfectly intact.

Freezing

This cake freezes well if you want to prepare it in advance. Wrap each cooled, unfrosted cake layer tightly in plastic wrap and then aluminum foil, freeze for up to 3 months. Thaw overnight in the refrigerator before frosting and assembling to maintain freshness and texture.

Reheating

It’s best to serve the cake at room temperature so allow refrigerated or previously frozen slices to sit out for about 30 minutes before enjoying. This brings back the soft crumb and silky frosting that you’ll love biting into.

FAQs

Can I substitute the cake flour with all-purpose flour?

While you can swap all-purpose flour for cake flour, the texture will be slightly denser. To mimic cake flour, remove two tablespoons of all-purpose flour per cup and replace them with cornstarch, then sift well before measuring.

Why do I need both eggs and egg whites in this recipe?

The whole eggs add flavor and richness, whereas the extra egg whites lighten the batter, resulting in a fluffy, tender crumb without sacrificing moisture.

How do I prevent the sprinkles from bleeding color into the batter?

Use high-quality rainbow sprinkles and fold them in gently at the end of mixing. Avoid over-mixing, as this can cause the colors to bleed and dull the look of your cake.

Can I make this cake dairy-free or vegan?

To adapt this Confetti Birthday Cake (Funfetti) Recipe for dairy-free or vegan needs, you can substitute plant-based butter, use a non-dairy milk with a splash of vinegar for buttermilk, and replace eggs with appropriate vegan egg replacers. Keep in mind texture and taste will vary slightly.

What’s the best way to level the cake layers?

A serrated knife works best for leveling. Place your cake on a flat surface, hold the knife parallel to the surface, and gently slice off the dome to create an even, sturdy surface for stacking and frosting.

Final Thoughts

This Confetti Birthday Cake (Funfetti) Recipe is a vibrant celebration on a plate that’s as joyful to bake as it is to eat. Its fluffy layers filled with colorful sprinkles and wrapped in luxuriously smooth frosting are guaranteed to brighten any occasion. So grab your mixing bowl and sprinkles, and whip up this delightful cake that will have everyone asking for another slice (and the recipe!) It’s truly a party in every bite.

Confetti Birthday Cake (Funfetti) Recipe

Ingredients You'll Need