Strawberry Funfetti Cake With Buttercream

The kitchen counter looked like a confetti explosion when my niece Lucy discovered the rainbow sprinkles. She was supposed to be helping me measure ingredients, but instead she was orchestrating what she called a sprinkles party and what I called a recipe for vacuum cleaner despair. Something about her absolute joy in turning everything colorful made me keep going anyway.

I made this for a neighbors birthday last summer and watched her six-year-old son literally do a little dance when he saw the rainbow flecks inside his slice. The best part was that the adults were just as excited, leaning over each other to see who got the piece with the most sprinkles baked in. Birthday cake justice at its finest.

Ingredients

• 2½ cups (310 g) all-purpose flour: The structure that holds all those sprinkles and strawberries together. Spoon and level the flour instead of dipping to avoid packing it down.
• 2½ tsp baking powder: This gives you those nice tall cake layers. Check the expiration date because old baking powder makes for sad flat cakes.
• ½ tsp salt: Just enough to make the strawberry flavor pop without making the cake taste salty.
• 1 cup (225 g) unsalted butter softened: Room temperature butter is nonnegotiable here. It should give slightly when pressed but not be melting or greasy.
• 1⅔ cups (330 g) granulated sugar: Creates that tender crumb and helps the cake stay moist for days. Cream it thoroughly with the butter for the best texture.
• 4 large eggs room temperature: Cold eggs can cause the butter to seize up and create weird lumps in your batter. Set them out about 30 minutes before baking.
• 1 cup (240 ml) whole milk room temperature: Whole milk makes the most tender cake but lowfat works in a pinch. The temperature matters more than the fat content here.
• ⅔ cup (150 g) finely chopped fresh strawberries: These create little pockets of strawberry jam throughout the cake. Chop them small so they distribute evenly.
• 1 tbsp pure vanilla extract: Do not skimp here. Real vanilla makes everything taste like it came from a bakery.
• ½ cup (80 g) rainbow sprinkles: Use the jimmies style not the nonpareils with the little balls. The round ones bleed color and make your cake look like a tie-dye experiment gone wrong.
• 1 cup (225 g) unsalted butter softened: This makes the frosting creamy and pipeable. Same temperature rules apply as the cake butter.
• 4 cups (480 g) powdered sugar sifted: Sifting prevents lumps in your frosting. Do not skip this unless you enjoy eating crunchy buttercream.
• ¼ cup (60 ml) strawberry puree: Blend fresh strawberries and strain out the seeds. This gives you that gorgeous pink color and real strawberry flavor in every bite.
• 1 tsp pure vanilla extract: Rounds out the strawberry flavor and makes it taste more complex.
• Pinch of salt: Cuts the sweetness just enough so you can actually eat more than one slice without feeling like you need to brush your teeth immediately.
• 1–2 tbsp milk or cream: Only add this if your frosting is too stiff. Sometimes the strawberry puree adds enough liquid on its own.

Instructions

Get your oven and pans ready:

Preheat your oven to 350°F (175°C). Grease two 8-inch round cake pans with butter then line the bottoms with parchment paper. Do not skip the parchment unless you enjoy trying to wiggle stuck cake out of pans while your frosting melts on the counter.

Whisk the dry ingredients:

In a medium bowl whisk together flour baking powder and salt. This ensures the leavening is evenly distributed so your cakes rise uniformly instead of lopsided.

Cream the butter and sugar:

Beat butter and sugar on medium-high speed for 3–4 minutes until the mixture is pale and fluffy. Scrape down the bowl halfway through so everything gets properly creamed. This step creates air bubbles that make the cake light.

Add the eggs and vanilla:

Add eggs one at a time beating well after each addition. Stir in the vanilla extract. The mixture might look curdled halfway through the eggs but keep going and it will smooth out again.

Combine wet and dry ingredients:

With the mixer on low add the flour mixture in three additions alternating with the milk. Begin and end with the flour. Mix only until combined. Overmixing here makes for tough cake and nobody wants that.

Fold in the fun stuff:

Gently fold in the chopped strawberries then the sprinkles by hand. Use a spatula and fold just until distributed. The sprinkles will bleed if you mix too vigorously so gentle is the keyword here.

Bake the cakes:

Divide batter evenly between the prepared pans. Smooth the tops with an offset spatula. Bake for 28–32 minutes until a toothpick comes out clean or with just a few moist crumbs. Start checking at 28 minutes because ovens vary.

Cool completely:

Let the cakes cool in the pans for 10 minutes then turn them out onto wire racks. Cool completely before frosting. Warm cake plus frosting equals melting sliding disaster so be patient.

Make the buttercream:

Beat the butter on medium speed until creamy about 2 minutes. Gradually add the powdered sugar mixing on low speed until combined. Add the strawberry puree vanilla and salt then beat until smooth and fluffy.

Adjust frosting consistency:

The frosting should be spreadable but hold its shape. If it is too thick add milk one tablespoon at a time. If it is too thin add more powdered sugar. The strawberry puree adds liquid so start with less milk than you think you need.

Assemble the cake:

Place one cake layer on your serving plate. Spread a generous layer of strawberry buttercream over the top. Place the second layer on top then frost the top and sides with the remaining buttercream.

Decorate and serve:

Add extra sprinkles on top if you want maximum rainbow impact. Slice and serve immediately or let the frosting set for about 30 minutes if you want cleaner slices.

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My sister insisted on making this for her daughters birthday and accidentally doubled the sprinkles. The cake looked like a carnival exploded inside it but honestly it was the most popular version I have ever made. Sometimes mistakes are just improvements in disguise.

Making This Ahead

The cake layers can be baked wrapped tightly in plastic and frozen for up to a month. Thaw them in the refrigerator overnight before frosting. This actually makes them easier to handle since cold cakes are firmer and less crumbly. The buttercream can also be made ahead and stored in the refrigerator for up to a week. Let it come to room temperature then beat it again before using to restore that fluffy texture.

Storage Tips

Keep the cake at room temperature for up to a day if the weather is cool. After that refrigerate it because fresh strawberries in the frosting can make it spoil faster than plain buttercream. Let refrigerated cake sit at room temperature for 30 minutes before serving. Cold cake never tastes as good as room temperature cake. For longer storage wrap individual slices in plastic and freeze them for up to three months.

Serving Suggestions

This cake is sweet enough on its own but a cup of coffee or cold milk balances it perfectly. For birthday parties serve it straight from the fridge so the frosting holds its shape better in warm weather. You can also turn this into cupcakes but reduce the baking time to 18–22 minutes and check them early since cupcakes bake faster than cake layers.

• Pair with fresh strawberries on the side for extra strawberry impact
• Vanilla ice cream turns this into a birthday cake sundae situation
• Cut the sweetness with slightly tart whipped cream if you prefer

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Every time I make this cake now I think about Lucy dancing in the kitchen with her rainbow-dusted hands. Sometimes the best recipes are the ones that make you remember the moments shared around them more than the actual ingredients.

Recipe Questions & Answers

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

Use jimmies-type sprinkles rather than nonpareils, and fold them in gently at the very end. Avoid over-mixing once the sprinkles are added to minimize color bleeding into the batter.

→ Can I make this cake ahead of time?

Yes, you can bake the cake layers up to 1 day in advance. Wrap them tightly in plastic wrap and store at room temperature. Frost the same day as serving for the freshest taste and texture.

→ How should I store the finished cake?

Store in an airtight container at room temperature for up to 1 day, or refrigerate for up to 4 days. Bring to room temperature before serving for the best flavor and texture.

→ Can I use frozen strawberries instead of fresh?

Yes, thaw the frozen strawberries completely and drain well before chopping. Pat them dry with paper towels to remove excess moisture, which can affect the cake's texture.

→ What's the best way to achieve vibrant strawberry flavor?

Use perfectly ripe fresh strawberries, and consider adding a few drops of natural strawberry extract to either the cake batter or buttercream for an extra boost of fruity essence without artificial taste.

→ Can I convert this to cupcakes?

Absolutely! Fill cupcake liners about two-thirds full and bake for 18–22 minutes at 350°F. This yields approximately 24 cupcakes. Frost with the same strawberry buttercream once completely cooled.