Neapolitan Cake with Buttercream

The first time I made this Neapolitan cake, my kitchen counter looked like a rainbow explosion. Pink speckled batter here, cocoa dust there, vanilla everywhere. But when those three layers came out of the oven, something magical happened.

I brought this to my niece's birthday last spring, and the kids went absolutely wild. They kept debating which layer was best, while the adults pretended not to fight over the chocolate corners.

Ingredients

• All-purpose flour: This is your foundation. I learned the hard way that sifting first makes layers lighter.
• Baking powder and baking soda: The double lift team that keeps each layer tender instead of dense.
• Unsalted butter: Room temperature is non-negotiable here. Cold butter creates stubborn, lumpy batter.
• Granulated sugar: Cream this thoroughly with the butter. Those air pockets are what make cake feel like cloud.
• Large eggs: Also room temperature. Cold eggs can actually seize up your butter mixture.
• Vanilla extract: Do not skimp. This is your flavor anchor across all three layers.
• Whole milk: I tried skim once and regretted it. The fat here matters for texture.
• Unsweetened cocoa powder: Dutch-processed gives deeper color, but regular works beautifully.
• Fresh strawberries: Chop them tiny so they distribute evenly, or use puree for a smoother strawberry layer.
• Powdered sugar: Sifting is tedious but crucial. Those lumps will haunt your buttercream.
• Heavy cream: Makes the frosting silkier than milk alone. The difference is real.

Instructions

Preheat your pans:

Get that oven to 350°F (175°C). Grease three 8-inch round pans and line with parchment. This saves so much heartache later.

Whisk the dry team:

In a medium bowl, combine flour, baking powder, baking soda, and salt. Give it a good whisk to aerate everything.

Cream butter and sugar:

Beat butter and sugar until its pale and fluffy, like 4 to 5 minutes serious fluffy. Add eggs one at a time, letting each disappear before the next.

Build the base batter:

Alternate adding flour mixture and milk, starting and ending with flour. Mix gently until just combined—over-mixing makes tough cake.

Divide and conquer:

Split batter equally among three bowls. Eyeballing it works, but a kitchen scale guarantees fairness.

Make the chocolate layer:

Whisk cocoa powder with 3 tbsp milk until smooth, then fold into one bowl of batter. The color deepens beautifully during baking.

Make the strawberry layer:

Fold chopped strawberries or puree into another bowl. Add extract and food coloring if you want that punchy pink.

Leave vanilla be:

The third bowl needs nothing—its already perfect as is.

Bake the layers:

Pour each batter into its prepared pan. Bake 25 to 30 minutes until a toothpick comes out clean.

Cool completely:

Let cakes rest 10 minutes in pans, then move to wire racks. Warm cake melts buttercream into a sad situation.

Make the buttercream:

Beat butter until creamy, then gradually add sifted powdered sugar. Add vanilla, cream, and salt. Whip until its lighter than air.

Assemble with patience:

Trim cake tops if needed. Stack chocolate, then strawberry, then vanilla with buttercream between each layer.

Crumb coat like a pro:

Apply a thin layer of frosting everywhere. Chill 30 minutes, then add the final coat. This trap method guarantees clean layers.

Save to Pinterest

My mom still talks about the time I accidentally swapped the chocolate and strawberry layers during assembly. Nobody noticed except me, but I learned that order matters as much as flavor.

Getting Clean Slices

Chill the fully assembled cake for at least an hour before cutting. A warm knife dipped in hot water between slices also helps. The clean reveal is worth the wait.

Flavor Variations

Swap strawberry puree for raspberry to shake things up. Or replace chocolate with coffee for a mocha spin. The base cake is endlessly forgiving.

Storage and Serving

This cake actually tastes better the next day when flavors have mingled. Keep it refrigerated but bring to room temperature 30 minutes before serving. Cold buttercream has no soul.

• Use a serrated knife for the cleanest cuts through all those layers.
• Leftovers (if they exist) freeze beautifully for up to two months.
• Press sprinkles gently into the sides before the frosting sets.

Save to Pinterest

Theres something so joyful about cutting into this cake and seeing those three colors smiling back. Every slice feels like a party.

Recipe FAQs

→ How do I prevent the cake layers from sinking?

Ensure your oven is fully preheated to 350°F before placing pans inside. Don't open the oven door during the first 20 minutes of baking—this allows the structure to set properly. Test doneness with a toothpick inserted in the center; it should come out clean or with just a few moist crumbs.

→ Can I make the layers ahead of time?

Absolutely. Bake and cool the layers completely, then wrap each tightly in plastic wrap and freeze for up to 3 months. Thaw overnight in the refrigerator before frosting. The buttercream can also be prepared 2-3 days in advance and stored in an airtight container at room temperature.

→ What's the best way to divide the batter evenly?

Weigh your mixing bowl empty first, then weigh it with all the batter inside. Subtract the bowl weight to get the batter weight, then divide by three for each portion. Alternatively, use a measuring cup to portion out approximately 1⅓ cups of batter per pan.

→ Can I use fresh strawberries instead of puree?

Yes, finely chop ½ cup fresh strawberries and gently fold them into the batter. The fruit adds moisture and natural sweetness, though the texture will be slightly more rustic than using puree. Pat chopped strawberries lightly with paper towels to remove excess moisture before incorporating.

→ How do I get smooth frosting on the sides?

Apply a thin crumb coat first—this traps loose crumbs and creates a smooth base. Chill for 30 minutes until firm, then apply the final layer of buttercream using an offset spatula. Warm the spatula under hot water and dry thoroughly for extra-glossy results.

→ Can I substitute cake flour for all-purpose flour?

Cake flour creates a more tender crumb. Substitute 1 cup cake flour for every 1 cup all-purpose flour, or use 2¾ cups cake flour minus 3 tablespoons in this recipe. The texture will be lighter and softer, perfect for an elegant presentation.