If you grew up loving birthday cakes speckled with rainbow sprinkles, this homemade funfetti cake will feel like a warm hug. It’s soft, moist, and bakes up with tender, bakery-style crumb. No boxed mix here—just simple pantry ingredients and a few smart tricks that keep the cake fluffy and bright.
The layers stack beautifully, the sprinkles stay vivid, and the frosting is rich without being heavy. Whether it’s a birthday, graduation, or Tuesday, this cake brings the party.
What Makes This Special
- Moist and tender crumb: Buttermilk and a touch of oil keep the cake soft for days.
- True funfetti look: Using the right sprinkles means bold confetti dots throughout, not streaks or fading color.
- Reliable layers: Straightforward mixing method, stable batter, and even bake—great for beginners and pros.
- Balanced frosting: A fluffy vanilla buttercream that’s sweet but not cloying.
- Make-ahead friendly: The cake layers and frosting both store well, so you can plan ahead.
Ingredients
For the Cake
- 2 3/4 cups (345 g) all-purpose flour
- 2 1/2 tsp baking powder
- 1/2 tsp baking soda
- 3/4 tsp fine salt
- 1 3/4 cups (350 g) granulated sugar
- 3/4 cup (170 g) unsalted butter, softened
- 1/4 cup (60 ml) neutral oil (canola or vegetable)
- 4 large eggs, room temperature
- 2 tsp pure vanilla extract
- 1/2 tsp almond extract (optional but recommended for classic bakery flavor)
- 1 cup (240 ml) buttermilk, room temperature
- 1/2 cup (120 ml) whole milk, room temperature
- 3/4 cup rainbow jimmies sprinkles (not nonpareils)
For the Vanilla Buttercream
- 1 1/2 cups (340 g) unsalted butter, softened
- 5–6 cups (600–720 g) powdered sugar, sifted
- 1/4 cup (60 ml) heavy cream or whole milk
- 2 tsp pure vanilla extract
- 1/8–1/4 tsp fine salt, to taste
- Extra sprinkles for decorating
Step-by-Step Instructions
- Prep the pans: Heat oven to 350°F (175°C). Grease and line three 8-inch round cake pans (or two 9-inch) with parchment.
Lightly flour the sides to prevent sticking.
- Whisk dry ingredients: In a medium bowl, whisk flour, baking powder, baking soda, and salt. Set aside.
- Cream butter and sugar: In a large bowl, beat butter and sugar on medium-high for 2–3 minutes until light and fluffy. This adds air and helps the cake rise.
- Add oil and eggs: Beat in oil until combined.
Add eggs one at a time, mixing well after each. Scrape the bowl as needed. Stir in vanilla and almond extract.
- Alternate dry and wet: Mix buttermilk and whole milk together.
Add the dry ingredients to the butter mixture in three additions, alternating with the milk mixture, beginning and ending with dry. Mix on low just until combined. Do not overmix.
- Fold in sprinkles: Gently fold in the rainbow jimmies with a spatula. Do not use nonpareils (the tiny balls) since they bleed color.
- Fill pans: Divide batter evenly among pans.
Smooth tops with a spatula and tap pans lightly on the counter to release large air bubbles.
- Bake: Bake 22–26 minutes for 8-inch layers (25–30 for 9-inch), or until a toothpick comes out clean with a few moist crumbs. The tops should spring back when lightly pressed.
- Cool completely: Let cakes cool in pans 10 minutes, then invert onto wire racks. Peel off parchment and cool fully before frosting.
- Make the frosting: Beat butter on medium-high until creamy, about 2 minutes.
Add 3 cups powdered sugar, vanilla, and salt. Beat on low to combine, then increase speed. Add remaining sugar and cream in stages until light and fluffy, 2–3 minutes.Adjust cream or sugar for spreadable consistency. Taste and add a pinch more salt if needed.
- Assemble: Level cake tops if domed. Place the first layer on a board, spread a generous layer of frosting, and repeat with the second and third layers.
Apply a thin crumb coat around the sides, chill 15–20 minutes, then finish with a smooth final coat.
- Decorate: Press sprinkles around the base and scatter on top. For a clean look, add a ring of sprinkles on the edges and keep the center smooth.
- Set and serve: Chill 20–30 minutes to set the frosting, then slice with a sharp, warm knife for neat pieces.
How to Store
- Room temperature: Keep covered at cool room temp for up to 2 days. Ideal if your kitchen is under 72°F (22°C).
- Refrigerator: Store tightly covered for 4–5 days.
Let slices sit at room temperature 30–45 minutes before serving for the best texture.
- Freezer: Wrap unfrosted layers in plastic and foil; freeze up to 2 months. Thaw in the fridge overnight, then bring to room temp before frosting.
- Frosting: Refrigerate in an airtight container up to 1 week or freeze up to 2 months. Re-whip with a splash of cream if needed.
Health Benefits
- Portion control: A satisfying, celebratory dessert can curb the urge to over-snack later.
Enjoy a mindful slice.
- Dairy proteins and fats: Butter and milk contribute small amounts of protein and calcium, and fat helps carry flavor so you feel content with less.
- Mood boost: Sharing a colorful cake often means connection and celebration—both linked to improved well-being.
- Customization: You can reduce sugar in the frosting slightly, use lower-fat milk, or opt for naturally colored sprinkles if you prefer.
Common Mistakes to Avoid
- Using the wrong sprinkles: Nonpareils bleed. Use rainbow jimmies for clean, bright confetti.
- Cold ingredients: Cold eggs and milk can cause curdling and dense texture. Bring everything to room temp.
- Overmixing: Mix just until combined after adding flour.
Overmixing develops gluten and toughens the cake.
- Overbaking: Even a few extra minutes can dry out the layers. Check early and look for moist crumbs.
- Skipping the crumb coat: A quick chill after a thin initial layer locks in stray crumbs for a smooth finish.
Alternatives
- Gluten-free: Use a 1:1 gluten-free all-purpose blend with xanthan gum. Let the batter rest 10 minutes before baking.
- Dairy-free: Substitute plant-based butter sticks and use unsweetened almond milk with 1 tsp vinegar to mimic buttermilk tang.
- Flavor twist: Swap almond extract for lemon or orange zest.
Add 1/2 tsp extra vanilla for a stronger classic flavor.
- Different pans: Make cupcakes (bake 16–20 minutes) or a 9×13-inch sheet cake (bake 28–34 minutes). Don’t overfill; aim for two-thirds full.
- Lighter frosting: Try whipped cream cheese frosting for a tangy balance. Keep refrigerated if using this option.
Explore more irresistible cake recipes you won’t want to miss:
FAQ
Can I use a boxed white cake mix and just add sprinkles?
Yes, but the texture and flavor won’t be as rich as this homemade version.
If using a mix, use buttermilk instead of water and add 2 tablespoons oil for extra moisture, then fold in jimmies.
Why did my sprinkles sink to the bottom?
Your batter may have been too thin or overmixed. Use jimmies, fold gently, and get the pans into the oven right away to set the structure before sprinkles drift.
How do I get flat, even layers?
Use a scale to divide batter evenly, tap pans to release bubbles, and bake on the center rack. Cake strips around the pans help prevent doming.
You can also level the tops with a serrated knife once cooled.
Can I make the cake a day ahead?
Absolutely. Bake and cool layers, then wrap well and store at room temp overnight or refrigerate up to 2 days. Frost the day you plan to serve for the freshest look.
What if I don’t have buttermilk?
Stir 1 tablespoon white vinegar or lemon juice into 1 cup milk and let sit 5 minutes.
It won’t be identical, but it adds similar tenderness and tang.
How sweet is the frosting?
It’s moderately sweet and fluffy. For less sweetness, start with 4 1/2 cups powdered sugar and add a pinch more salt and vanilla, adjusting cream for texture.
Can I color the cake batter?
Yes, but use gel food coloring and go light so the sprinkles still shine. Mix the color fully before adding sprinkles to avoid streaking.
Wrapping Up
This Moist Confetti Layer Cake is all about simple techniques that deliver a bakery-worthy result at home.
With tender layers, bright sprinkles, and a smooth vanilla buttercream, it’s a crowd-pleaser for any celebration. Keep the ingredients at room temperature, don’t overmix, and use the right sprinkles—that’s the winning trio. Bake it today, share it with people you love, and let the confetti do the talking.
Moist Confetti Layer Cake Easy Homemade Funfetti Cake – Colorful, Soft, and Celebration-Ready
Ingredients
- 2 3/4 cups (345 g) all-purpose flour
- 2 1/2 tsp baking powder
- 1/2 tsp baking soda
- 3/4 tsp fine salt
- 1 3/4 cups (350 g) granulated sugar
- 3/4 cup (170 g) unsalted butter, softened
- 1/4 cup (60 ml) neutral oil (canola or vegetable)
- 4 large eggs, room temperature
- 2 tsp pure vanilla extract
- 1/2 tsp almond extract (optional but recommended for classic bakery flavor)
- 1 cup (240 ml) buttermilk, room temperature
- 1/2 cup (120 ml) whole milk, room temperature
- 3/4 cup rainbow jimmies sprinkles (not nonpareils)
- 1 1/2 cups (340 g) unsalted butter, softened
- 5–6 cups (600–720 g) powdered sugar, sifted
- 1/4 cup (60 ml) heavy cream or whole milk
- 2 tsp pure vanilla extract
- 1/8–1/4 tsp fine salt, to taste
- Extra sprinkles for decorating
Instructions
- Prep the pans: Heat oven to 350°F (175°C). Grease and line three 8-inch round cake pans (or two 9-inch) with parchment.Lightly flour the sides to prevent sticking.
- Whisk dry ingredients: In a medium bowl, whisk flour, baking powder, baking soda, and salt. Set aside.
- Cream butter and sugar: In a large bowl, beat butter and sugar on medium-high for 2–3 minutes until light and fluffy. This adds air and helps the cake rise.
- Add oil and eggs: Beat in oil until combined.Add eggs one at a time, mixing well after each. Scrape the bowl as needed. Stir in vanilla and almond extract.
- Alternate dry and wet: Mix buttermilk and whole milk together.Add the dry ingredients to the butter mixture in three additions, alternating with the milk mixture, beginning and ending with dry. Mix on low just until combined. Do not overmix.
- Fold in sprinkles: Gently fold in the rainbow jimmies with a spatula. Do not use nonpareils (the tiny balls) since they bleed color.
- Fill pans: Divide batter evenly among pans.Smooth tops with a spatula and tap pans lightly on the counter to release large air bubbles.
- Bake: Bake 22–26 minutes for 8-inch layers (25–30 for 9-inch), or until a toothpick comes out clean with a few moist crumbs. The tops should spring back when lightly pressed.
- Cool completely: Let cakes cool in pans 10 minutes, then invert onto wire racks. Peel off parchment and cool fully before frosting.
- Make the frosting: Beat butter on medium-high until creamy, about 2 minutes.Add 3 cups powdered sugar, vanilla, and salt. Beat on low to combine, then increase speed. Add remaining sugar and cream in stages until light and fluffy, 2–3 minutes.Adjust cream or sugar for spreadable consistency. Taste and add a pinch more salt if needed.
- Assemble: Level cake tops if domed. Place the first layer on a board, spread a generous layer of frosting, and repeat with the second and third layers.Apply a thin crumb coat around the sides, chill 15–20 minutes, then finish with a smooth final coat.
- Decorate: Press sprinkles around the base and scatter on top. For a clean look, add a ring of sprinkles on the edges and keep the center smooth.
- Set and serve: Chill 20–30 minutes to set the frosting, then slice with a sharp, warm knife for neat pieces.