Fluffy Small Batch Funfetti Layer Cake

It’s hard not to smile when you slice into a small batch funfetti layer cake, there’s just something about those colorful sprinkles peeking through buttery, soft cake. This small batch funfetti layer cake recipe is my answer to the craving for a real celebration cake, even when you don’t need, well, a party-sized slab. Each bite is confetti-dotted and light, with a gentle vanilla aroma, a springy crumb, and a creamy, not-too-sweet frosting that brings the whole thing together.

I rely on sour cream here to keep the cake moist for days, while the egg white gives it that dreamy, fluffy texture you want from a bakery cake. Mix the batter just until smooth, and be gentle with the sprinkles so they keep their playful pop of color. Grab your 6-inch pans and let’s make the happiest little cake imaginable. This is the funfetti fix that always makes a day brighter.

Why You’ll Frickin’ Love This Small Batch Funfetti Layer Cake Recipe

• Sour cream keeps the cake extra moist: Just a little sour cream in the batter guarantees a tender, melt-in-your-mouth crumb without making the cake dense, perfect for a delicate layer cake that still slices cleanly.
• Egg white for lightness and lift: Using just one egg white (no yolk) makes the layers extra fluffy and keeps the cake from getting too rich, so the vanilla and sprinkles truly shine.
• Sprinkles mixed in at the end stay colorful: By folding in rainbow sprinkles right before baking, they hold their color and dot every slice with plenty of confetti, instead of bleeding or clumping.
• Creaming butter and sugar for structure: Taking a few minutes to properly cream the butter and sugar gives the cake layers a soft, fine crumb and light volume, making every bite taste bakery-worthy.
• Small batch means less waste, more joy: Baking just two petite layers (in 6-inch pans) gives enough cake for a celebration, without leftovers drying out, plus, they cool and stack quickly for easy decorating.

Ingredient Notes for Small Batch Funfetti Layer Cake

• All-purpose flour: Provides structure and a soft crumb when measured accurately; too much can make small cakes dry, so spoon into your cup and level off.
• Unsalted butter: The creamed base gives rich flavor and classic bakery texture; let it soften so it beats up nice and fluffy.
• Granulated sugar: Sweetens and aerates the cake during creaming for a tender and light bite.
• Egg white: Adds lift and keeps the cake delicate instead of dense; the yolk isn’t needed for a bright, pale funfetti crumb.
• Sour cream: The key to consistent moisture; full-fat preferred for best texture.
• Whole milk: Loosens the batter and helps distribute sprinkles evenly.
• Vanilla extract: Use pure vanilla for classic birthday cake flavor throughout.
• Rainbow jimmies: The long sprinkle style resists bleeding, stir them in gently for best color.
• Baking powder: A small but crucial dose for reliable rise in this small batch.
• Salt: Balances sweetness and sharpens the funfetti flavor.
• Cream cheese: For the frosting, adds tang and stability so it’s creamy and pipes well.
• Powdered sugar: Sifts easily into the frosting for a luscious, smooth finish that’s not gritty at all.

Expert Baking Tips

• Temperature matters for ingredients: Starting with room temperature butter, milk, and cream cheese makes mixing effortless and prevents the cake and frosting from splitting or becoming lumpy.
• Don’t overmix after adding flour: Overmixing will develop the gluten and toughen the crumb, which you definitely don’t want in this small, tender cake.
• Gently fold in sprinkles last: This avoids streaky batter and big blobs of color, use just a few folds so the funfetti remains distinct and bright.
• Test for doneness with a toothpick: Look for a clean toothpick or just a few moist crumbs; underbaked cakes will sink, while overbaked ones dry out quickly due to their small size.
• Chill before decorating for extra tidy layers: If your kitchen is warm, pop the cake layers in the fridge for 20 minutes before frosting, they’ll stack, fill, and frost with much less mess.

My Best Tips for Stacking and Decorating a Small Batch Funfetti Cake

Stacking and frosting a petite funfetti layer cake is just as satisfying as a full-sized one, maybe more, since you get crisp edges and easy handling. Here’s how I make mine picture-perfect:

• Chill the layers before assembly: A short stint in the fridge firms the cake just enough for easy handling, so the layers stack cleanly and do not crumble as you frost.
• Trim domed tops if needed: Sometimes even 6-inch cakes get a little hump. Use a serrated knife to gently level the tops for smooth, stable stacking.
• Apply a thin crumb coat: Lock in all those funfetti bits with a light layer of frosting all over, then chill again before the final swoop, this keeps sprinkles from coloring your buttercream.
• Frost from the center out: Add most of the frosting to the top first, then work down the sides for clean edges, turning the cake on a small cake stand or lazy Susan if you have one.
• Finish with extra sprinkles on top: Press a few extra rainbow sprinkles onto the crown or along the base for instant party vibes, even if it’s just you and a fork.

With these simple steps, your small batch funfetti cake will look festive, polished, and absolutely irresistible, just waiting for candles or a big slice.

Ingredients for Small Batch Funfetti Layer Cake

• 90 g all-purpose flour (spooned and leveled)
• 3/4 tsp baking powder
• 1/4 tsp fine salt
• 56 g unsalted butter (room temperature)
• 90 g granulated sugar
• 1 large egg white (room temperature)
• 40 g sour cream (room temperature, full-fat preferred)
• 60 ml whole milk (room temperature)
• 1 tsp pure vanilla extract
• 36 g rainbow jimmies sprinkles (plus more for decorating)
• 56 g unsalted butter (room temperature, for frosting)
• 56 g cream cheese (room temperature, for frosting)
• 130 g powdered sugar (sifted, for frosting)
• 1/2 tsp pure vanilla extract (for frosting)
• 1/2 tbsp whole milk (for frosting, more as needed)
• 1/8 tsp fine salt (for frosting)

How to Make Small Batch Funfetti Layer Cake

• STEP 1). Prep the pans and oven Preheat your oven to 350°F (175°C). Lightly grease two 6-inch round cake pans and line each bottom with a round of parchment. This prevents sticking and ensures clean release of the delicate cake layers after baking.
• STEP 2). Sift dry ingredients In a medium bowl, sift together the flour, baking powder, and salt. Whisk briefly to combine fully, breaking up any clumps and ensuring even distribution, a key for these smaller cakes to rise evenly.
• STEP 3). Cream butter and sugar With a hand mixer or stand mixer, beat the butter and granulated sugar together on medium-high speed for 2-3 minutes until the mixture is pale, light, and fluffy. This step builds your crumb’s foundation, so take the time to truly aerate the mixture.
• STEP 4). Add egg white and vanilla Add the egg white and vanilla extract to the bowl. Mix on medium-low just until they’re incorporated and the batter looks smooth and a little glossy. Stop and scrape down the bowl to avoid streaks or overmixing.
• STEP 5). Incorporate sour cream and dry ingredients Mix in the sour cream on low speed until combined. Add half of the sifted dry ingredients and mix gently. Then add all the milk, mixing just until smooth. Fold in the remaining dry ingredients by hand to avoid overmixing the batter.
• STEP 6). Fold in the sprinkles Sprinkle the rainbow jimmies over the batter and gently fold them in with a spatula. Use a light hand so the colors stay intact, in just a few swoops, the batter should look evenly dotted but not streaky.
• STEP 7). Portion and bake the cakes Evenly divide the batter between the two prepared pans, smoothing the tops with an offset spatula. Bake at 350°F (175°C) for 19-22 minutes, or until the cakes are lightly golden, spring back to the touch, and a toothpick comes out clean with a few moist crumbs.
• STEP 8). Cool the cakes completely Let the cakes cool in their pans for 7 minutes, then run a knife around the edges and turn out onto a wire rack. Peel off parchment and let cool completely before frosting, cooling makes layering and frosting smooth, not crumb-prone.
• STEP 9). Make the cream cheese frosting In a medium bowl, beat the room temperature butter and cream cheese together on medium-high until creamy and fully blended. Gradually add powdered sugar, salt, and vanilla extract, beating on low until smooth. Add milk until the frosting is fluffy and spreadable but holds soft peaks.
• STEP 10). Assemble and decorate Level the cakes with a serrated knife if needed. Place one cake layer on your serving plate and spread with about a third of the frosting. Stack the second layer on top, applying light pressure to secure. Frost the top and sides, smoothing into swoops or crisp edges, then finish with extra sprinkles.

Storage and Freezing

• Store leftover cake, well wrapped, in the fridge for up to 4 days. Bring to room temperature before serving for best texture.
• Freeze tightly wrapped, unfrosted layers for up to 2 months.
• Thaw overnight in the fridge and frost as desired. Frosted cake can be frozen, chill until solid, then wrap and freeze for up to 2 weeks; defrost overnight in the fridge and serve at room temperature.

Frequently Asked Questions

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Fluffy Small Batch Funfetti Layer Cake

This fluffy small batch funfetti layer cake is a celebration in miniature, with tender, buttery layers loaded with rainbow sprinkles and a creamy vanilla buttercream. Perfect for birthdays or spontaneous dessert cravings, it bakes up beautifully in two 6-inch pans, delivering bakery-style funfetti flavor and soft, nostalgic texture in a perfectly sized package.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 22 minutes mins

Cooling 40 minutes mins

Total Time 1 hour hr 22 minutes mins

Servings: 8 slices

Course: Dessert

Cuisine: American

Calories: 314

Ingredients Equipment Method Notes

Ingredients

  

• 90 g all-purpose flour spooned and leveled
• 3/4 tsp baking powder
• 1/4 tsp fine salt
• 56 g unsalted butter room temperature
• 90 g granulated sugar
• 1 large egg white room temperature
• 40 g sour cream room temperature, full-fat preferred
• 60 ml whole milk room temperature
• 1 tsp pure vanilla extract
• 36 g rainbow jimmies sprinkles plus more for decorating
• 56 g unsalted butter room temperature, for frosting
• 56 g cream cheese room temperature, for frosting
• 130 g powdered sugar sifted, for frosting
• 1/2 tsp pure vanilla extract for frosting
• 1/2 tbsp whole milk for frosting, more as needed
• 1/8 tsp fine salt for frosting

Equipment

• Two 6-inch round cake pans
• Hand mixer or stand mixer
• mixing bowls
• Small offset spatula
• Parchment paper
• Cooling rack
• Rubber spatula
• Measuring cups and spoons
• Serrated knife (for leveling, optional)

Method

 

1. Preheat your oven to 350°F (175°C). Lightly grease two 6-inch round cake pans and line each bottom with a round of parchment. This prevents sticking and ensures clean release of the delicate cake layers after baking.
2. In a medium bowl, sift together the flour, baking powder, and salt. Whisk briefly to combine fully, breaking up any clumps and ensuring even distribution, a key for these smaller cakes to rise evenly.
3. With a hand mixer or stand mixer, beat the butter and granulated sugar together on medium-high speed for 2-3 minutes until the mixture is pale, light, and fluffy. This step builds your crumb’s foundation, so take the time to truly aerate the mixture.
4. Add the egg white and vanilla extract to the bowl. Mix on medium-low just until they're incorporated and the batter looks smooth and a little glossy. Stop and scrape down the bowl to avoid streaks or overmixing.
5. Mix in the sour cream on low speed until combined. Add half of the sifted dry ingredients and mix gently. Then add all the milk, mixing just until smooth. Fold in the remaining dry ingredients by hand to avoid overmixing the batter.
6. Sprinkle the rainbow jimmies over the batter and gently fold them in with a spatula. Use a light hand so the colors stay intact, in just a few swoops, the batter should look evenly dotted but not streaky.
7. Evenly divide the batter between the two prepared pans, smoothing the tops with an offset spatula. Bake at 350°F (175°C) for 19-22 minutes, or until the cakes are lightly golden, spring back to the touch, and a toothpick comes out clean with a few moist crumbs.
8. Let the cakes cool in their pans for 7 minutes, then run a knife around the edges and turn out onto a wire rack. Peel off parchment and let cool completely before frosting, cooling makes layering and frosting smooth, not crumb-prone.
9. In a medium bowl, beat the room temperature butter and cream cheese together on medium-high until creamy and fully blended. Gradually add powdered sugar, salt, and vanilla extract, beating on low until smooth. Add milk until the frosting is fluffy and spreadable but holds soft peaks.
10. Level the cakes with a serrated knife if needed. Place one cake layer on your serving plate and spread with about a third of the frosting. Stack the second layer on top, applying light pressure to secure. Frost the top and sides, smoothing into swoops or crisp edges, then finish with extra sprinkles.

Notes

• Temperature matters for ingredients: Starting with room temperature butter, milk, and cream cheese makes mixing effortless and prevents the cake and frosting from splitting or becoming lumpy.
• Don’t overmix after adding flour: Overmixing will develop the gluten and toughen the crumb, which you definitely don’t want in this small, tender cake.
• Gently fold in sprinkles last: This avoids streaky batter and big blobs of color, use just a few folds so the funfetti remains distinct and bright.
• Test for doneness with a toothpick: Look for a clean toothpick or just a few moist crumbs; underbaked cakes will sink, while overbaked ones dry out quickly due to their small size.
• Chill before decorating for extra tidy layers: If your kitchen is warm, pop the cake layers in the fridge for 20 minutes before frosting, they’ll stack, fill, and frost with much less mess.