This soft, colorful sprinkle cake is everything a celebration needs tender crumb, sweet vanilla flavor, and rainbow sprinkles baked right in. I first made this for Liam's 7th birthday when he asked for "a cake that looks like happiness," and honestly, he nailed the description. It's simple enough for a Tuesday afternoon but special enough for any party.
If you love easy birthday cakes that taste homemade (because they are), you'll want to bookmark this Easy Lemon Shortbread Cookies Recipe and Delicious Cookies and Cream Cupcakes too-they're just as cheerful. This one layer cake skips the fuss of stacking and still delivers that bakery-style wow factor.
Why You'll Love This Sprinkle Cake
This homemade sprinkle cake gives you all the nostalgia of boxed funfetti but with a softer, more buttery texture. The sour cream keeps it incredibly moist, and the vanilla buttercream frosting is creamy without being too sweet. It's a quick cake recipe that doesn't need fancy decorating skills just spread the frosting, add more sprinkles if you're feeling festive, and you're done. Plus, it only dirties one cake pan, which means less cleanup and more time enjoying the actual celebration.
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Sprinkle Cake Ingredients
Here's everything you need for this vibrant birthday cake. Room temperature ingredients mix better and create a lighter texture.
See Recipe Card Below This Post For Ingredient Quantities
For the Cake:
- Cake flour: Creates a tender, soft crumb that's lighter than all-purpose flour. Spoon and level it for accuracy.
- Baking powder: Helps the cake rise and stay fluffy.
- Baking soda: Works with the sour cream to add lift and balance acidity.
- Salt: Enhances the vanilla flavor and balances sweetness.
- Unsalted butter: Adds richness and moisture. Make sure it's softened so it creams smoothly with the sugar.
- Granulated sugar: Sweetens the cake and helps create a light, airy texture when beaten with butter.
- Egg whites: Provide structure without adding the heaviness of yolks, keeping the cake pale and fluffy.
- Sour cream: Adds moisture and a slight tang that makes the cake extra tender.
- Pure vanilla extract: Gives the cake its signature warm, sweet flavor.
- Whole milk: Thins the batter to the right consistency and keeps it moist.
- Sprinkles: The star of the show. Use jimmies (the long ones) rather than nonpareils for best results.
For the Vanilla Buttercream:
- Unsalted butter: The base of the frosting. Softened butter whips into a creamy, spreadable consistency.
- Confectioners' sugar: Sweetens and thickens the frosting.
- Heavy cream: Adds smoothness and makes the frosting lighter. You can use half-and-half or whole milk instead.
- Pure vanilla extract: Enhances the buttery sweetness.
- Salt: A pinch balances the sugar and deepens the flavor.
- Sprinkles for garnish: Optional, but they make the cake look extra festive.
How to Make Sprinkle Cake
This easy Sprinkle Cake recipe comes together quickly with just a few simple steps.
Preheat oven and prepare pan: Preheat your oven to 350°F (177°C). Grease a 9x2-inch round cake pan, line the bottom with parchment paper, and grease the parchment too so nothing sticks.
Whisk dry ingredients: In a medium bowl, whisk together the cake flour, baking powder, baking soda, and salt. Set this aside while you work on the wet ingredients.
Cream butter and sugar: In a stand mixer, beat the softened butter on high speed for 1 minute until it's smooth and creamy. Add the granulated sugar and beat on high for 2 minutes until the mixture turns light and fluffy.
Add wet ingredients: Beat in the egg whites on high until combined, then add the sour cream and vanilla extract. Mix until everything is smooth and well blended.
Combine wet and dry: With the mixer on low, slowly add the dry ingredients to the wet mixture. Once combined, gradually pour in the milk while continuing to mix on low. Don't overmix-stop as soon as everything comes together. If you see any lumps, gently whisk the batter by hand. Fold in the sprinkles carefully so they stay evenly distributed.
Bake the cake: Pour the batter into your prepared pan. Bake for 27-31 minutes, or until a toothpick inserted into the center comes out clean. After 18 minutes, tent the top with aluminum foil to prevent the cake from browning too much. Let the cake cool completely in the pan on a wire rack before you frost it-this usually takes about 2 hours.
Make the buttercream: Beat the softened butter on medium speed for 1 minute until creamy. Gradually add the confectioners' sugar, heavy cream, and vanilla extract, beating on low for 30 seconds, then increase to medium-high and beat for 2 minutes until fluffy. If the frosting seems too thin, add up to ¼ cup more confectioners' sugar. If it's too thick, add a splash more cream. Taste and add a pinch of salt if needed.
Frost and garnish: Once the cake is completely cool, spread the vanilla buttercream over the top using an icing spatula. Add extra sprinkles on top if you want that full funfetti sprinkle cake look.
Substitutions and Variations
Cake flour: If you don't have cake flour, make your own by measuring 1 and ½ cups all-purpose flour, removing 3 tablespoons, and replacing it with 3 tablespoons cornstarch. Whisk well before using.
Sour cream: Plain Greek yogurt works in a pinch, though the texture will be slightly less tender.
Egg whites: You can use 1 whole egg instead, but the cake will have a slightly denser texture and a less white color.
Sprinkles: Use jimmies (long sprinkles) instead of nonpareils (the tiny round ones), which can bleed color into the batter.
Frosting: Swap the vanilla buttercream for cream cheese frosting if you prefer a tangier topping.
Equipment For Sprinkle Cake
Here's what makes this Sprinkle Cake come together smoothly.
- 9x2-inch round cake pan: The right size for a perfect one-layer cake.
- Handheld or stand mixer with paddle attachment: Creams the butter and sugar efficiently.
- Mixing bowls: One for dry ingredients, one for wet.
- Whisk: For combining dry ingredients evenly.
- Cooling rack: Lets air circulate around the cake so it cools faster.
- Icing spatula: Makes frosting the top easy and smooth.
Storage and Make-Ahead Tips
Room temperature: Store the frosted cake under a cake dome or loosely covered with plastic wrap for up to 2 days. The buttercream holds up well at room temperature.
Refrigerator: If your kitchen is warm or you want to keep it longer, refrigerate the cake for up to 5 days. Let it sit at room temperature for 30 minutes before serving so the frosting softens.
Freezer: Wrap the unfrosted, cooled cake tightly in plastic wrap, then in aluminum foil. Freeze for up to 3 months. Thaw in the fridge overnight, then frost before serving.
Make-ahead: You can bake the cake a day ahead, wrap it well, and store it at room temperature. Make the frosting the next day and assemble right before serving.
Serving Suggestions
This colorful one-layer Sprinkle Cake is perfect for celebrations, but here are a few fun ways to serve it.
With ice cream: A scoop of vanilla or strawberry ice cream on the side turns this into a real party dessert.
As cupcakes: Divide the batter into a muffin tin and bake for 18-22 minutes for individual birthday sprinkle cake treats.
With fresh berries: Add a handful of raspberries or sliced strawberries on top for a fresh, fruity contrast.
Alongside coffee: This pairs beautifully with a hot cup of coffee or a glass of cold milk, especially if you're serving it at a casual afternoon gathering. It also goes wonderfully with Peanut Butter Cup Tart if you're laying out a dessert spread.
Expert Tips
Bring ingredients to room temperature: Cold eggs and sour cream won't mix as smoothly, and you'll end up with a denser cake. Set everything out about an hour before baking.
Don't overmix the batter: Once you add the flour, mix just until combined. Overmixing develops gluten and makes the cake tough.
Use the right sprinkles: Jimmies hold their color better during baking. Nonpareils can bleed and turn the batter gray or muddy-looking.
Cool completely before frosting: If the cake is even slightly warm, the buttercream will melt and slide right off.
Tent with foil: This prevents the top from browning too much while the center finishes baking.
Level the top if needed: If your Sprinkle Cake domes in the middle, use a serrated knife to carefully slice off the top so the frosting sits flat.
FAQ
Do you put sprinkle cake in the fridge?
You can, but it's not required. This moist sprinkle cake stays fresh at room temperature for up to 2 days if covered. Refrigerate it if your kitchen is warm or if you want to keep it longer than that. Just bring it to room temperature before serving so the frosting softens.
How long does sprinkle cake take to set?
The cake itself is ready once it cools completely, which takes about 2 hours. The buttercream frosting sets within 30 minutes at room temperature, but you can serve it right away if you're impatient.
What are the 7 rules for baking perfect cake?
Use room temperature ingredients, measure accurately, don't overmix, preheat your oven, test for doneness with a toothpick, cool completely before frosting, and use quality vanilla extract. These basics will help you bake better cakes every time, whether it's this Sprinkle Cake for celebrations or something more elaborate like Spumoni Cookies.
How far in advance can you put sprinkles on a cake?
You can add sprinkles to the frosting right after you spread it, or up to a day ahead if the cake is stored properly. They won't lose their color or texture as long as the cake is kept covered and away from moisture.
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Sprinkle Cake
Ingredients
Method
- Preheat the oven to 350°F (177°C). Grease a 9-inch round cake pan, line the bottom with parchment paper, and grease the paper.
- In a medium bowl, whisk together the cake flour, baking powder, baking soda, and salt. Set aside.
- Using a handheld or stand mixer, beat the butter on high speed until smooth and creamy, about 1 minute. Add the sugar and beat until light and fluffy, about 2 minutes.
- Add the egg whites, sour cream, and vanilla extract to the butter mixture. Beat on high speed until well combined.
- Gradually add the dry ingredients to the wet ingredients. With the mixer on low speed, slowly pour in the milk. Beat on low speed just until combined, being careful not to overmix. If needed, fold by hand to ensure no lumps.
- Gently fold in the sprinkles.
- Pour the batter evenly into the prepared cake pan. Bake for 27-31 minutes, or until a toothpick inserted into the center comes out clean. After 18 minutes, tent the cake with aluminum foil to prevent over-browning.
- Allow the cake to cool completely in the pan on a wire rack before frosting.
- For the buttercream: Beat the butter on medium speed until creamy. Gradually add the powdered sugar, heavy cream, and vanilla extract. Beat on medium-high speed for about 2 minutes until smooth and fluffy. If needed, add more sugar to thicken or a splash of cream to thin.
- Spread the buttercream evenly over the cooled cake. Garnish with sprinkles if desired.
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