Mouthwatering Cake Mix Neapolitan Cookies

Here are my favorite cake mix neapolitan cookies, with an easy shortcut using boxed cake mix, and all three classic flavors – vanilla, chocolate, and strawberry – rolled together in one sweet treat.

These neapolitan cookies are always a hit at school bake sales and family gatherings. I love how they look so fancy but are actually simple to make. Plus, the kids get excited seeing all three flavors in one cookie!

What Kind of Cake Mix Should I Use?

Any standard vanilla cake mix will work perfectly for these Neapolitan cookies, so feel free to grab whatever brand you prefer or have on hand. The 15.25-ounce box size is pretty standard across most grocery store brands, so you shouldn’t have trouble finding the right amount. If you’re feeling adventurous, you could even try a white cake mix instead of vanilla – it’ll give you a slightly more neutral base that lets the chocolate and strawberry flavors shine through even more. Just make sure to stick with a basic vanilla or white mix rather than anything with added flavors or mix-ins, since we’re creating our own flavor variations with the cocoa and strawberry jam.

Options for Substitutions

This fun cookie recipe has some room for swaps if you need to make changes:

• Vanilla cake mix: You can use white or yellow cake mix instead of vanilla – they’ll work just as well. Avoid chocolate cake mix though, as it will throw off the three-flavor theme.
• Egg whites: If you only have whole eggs, use 2 whole eggs instead of 4 egg whites. The cookies will be slightly more dense but still tasty.
• Sour cream: Plain Greek yogurt works as a great substitute here. You can also use regular plain yogurt, but drain it for 30 minutes first to remove excess moisture.
• Strawberry jam: Any red jam or preserves will work – try raspberry, cherry, or even apricot jam. Just make sure to strain out any large fruit pieces first.
• Cocoa powder: Use unsweetened cocoa powder for best results. If you only have sweetened cocoa mix, reduce the powdered sugar by 2 tablespoons in the frosting.
• Butter: Make sure your butter is properly softened for both the cookies and frosting. If you’re in a pinch, you can use margarine, but the flavor won’t be quite as rich.

Watch Out for These Mistakes While Baking

The biggest mistake when making cake mix cookies is adding too much liquid, which can turn your dough into a sticky mess that’s impossible to work with – if your dough feels too wet, add a tablespoon of flour at a time until it holds together properly.

Another common error is not chilling the dough long enough before slicing, especially for the layered Neapolitan effect – aim for at least 2 hours in the fridge so the layers stay distinct and don’t blend together when you cut them.

When dividing your dough into three portions for the different flavors, make sure each section is roughly the same size so your cookies bake evenly, and don’t overmix the cocoa powder into the chocolate portion as this can make the cookies tough.

Finally, watch your baking time closely since cake mix cookies can go from perfectly soft to overbaked in just a minute or two – they should look set but still slightly soft in the center when you pull them out.

What to Serve With Cake Mix Neapolitan Cookies?

These cookies are perfect on their own, but they’re even better with a cold glass of milk for dunking – the creamy milk really complements all three flavors in each bite. I love serving them alongside vanilla ice cream for an extra indulgent treat, or you can crumble them over the top of ice cream sundaes for added texture. They also make a great addition to a dessert platter with fresh strawberries and whipped cream, which plays up that classic neapolitan theme. For parties, try arranging them on a tray with other cookies or small desserts – they always disappear fast!

Storage Instructions

Store: These colorful cookies stay soft and delicious when kept in an airtight container at room temperature for up to a week. I like to place a piece of parchment paper between layers to keep them from sticking together, especially since they have that lovely jam swirl.

Freeze: You can freeze these cookies for up to 3 months in a freezer-safe container or bag. Just make sure they’re completely cooled first, and again, layer them with parchment paper. They thaw quickly at room temperature in about 20-30 minutes.

Make Ahead: The cookie dough can be made ahead and chilled in the fridge for up to 2 days before baking. You can also freeze the shaped dough balls on a baking sheet, then transfer to a freezer bag and bake straight from frozen – just add an extra minute or two to the baking time.

 

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 3300-3600
• Protein: 22-28 g
• Fat: 130-150 g
• Carbohydrates: 510-540 g

Ingredients

For the cookies:

• 1/2 cup butter, at room temperature (I use Kerrygold unsalted butter)
• 2 tbsp unsweetened cocoa powder (for Neapolitan chocolate flavor)
• 1/4 cup sour cream (adds moisture and tang)
• 1 box vanilla cake mix (15.25 oz)
• 4 egg whites (room temperature for better volume)

For the strawberry frosting:

• 1/2 cup butter, softened (allows for smooth creaming)
• 2 1/4 cups powdered sugar (sifted to remove lumps)
• 1/3 cup strawberry jam (I use Smuckers for consistent results)

Step 1: Prepare Mise en Place and Make the Cookie Dough

• 1 box vanilla cake mix
• 1/2 cup butter, at room temperature
• 4 egg whites
• 1/4 cup sour cream
• 2 1/4 cups powdered sugar

Start by bringing your butter and egg whites to room temperature—this is crucial for proper volume and texture in the final cookies.

Sift your powdered sugar into a small bowl to remove any lumps, which will make your frosting perfectly smooth later.

In a large mixing bowl, combine the vanilla cake mix, softened butter, room-temperature egg whites, and sour cream.

Mix on medium speed for about 2 minutes until the dough comes together.

The sour cream adds moisture and a subtle tang that balances the sweetness beautifully.

Step 2: Create Vanilla and Chocolate Dough Portions

• 2 tbsp unsweetened cocoa powder
• Vanilla dough from Step 1
• Chocolate dough portion

Divide your dough in half, placing one half in a separate bowl.

Add the unsweetened cocoa powder to one half and mix thoroughly until the color is evenly distributed and you have a rich chocolate dough.

You’ll now have two distinct portions: plain vanilla dough and chocolate dough.

I like to use unsweetened cocoa powder rather than mixing chocolate into the dough because it keeps the texture consistent with the vanilla version and gives you true Neapolitan contrast.

Step 3: Portion and Chill the Dough

• Vanilla dough from Step 2
• Chocolate dough from Step 2

Scoop 12 balls from the vanilla dough and 12 balls from the chocolate dough onto a parchment-lined baking sheet, spacing them about 2 inches apart.

Refrigerate the entire sheet for 1 hour.

Chilling the dough prevents the cookies from spreading too much during baking and helps them maintain a consistent size, which is important for neat cookie sandwich assembly later.

Step 4: Bake the Cookies in Batches

• Chilled cookie dough from Step 3

Preheat your oven to 350°F.

Remove the baking sheet from the refrigerator and gently roll each chilled dough ball with your fingers to smooth out any cracks, but don’t compress them too much.

Bake 8-10 cookies at a time for 9-11 minutes, until the edges are just set but the centers are still slightly soft.

The cookies will continue to set as they cool, creating a tender interior.

Let each batch cool on the baking sheet for 2 minutes, then transfer to a wire rack to cool completely before frosting.

Step 5: Make the Strawberry Buttercream Frosting

• 1/2 cup butter, softened
• 2 1/4 cups powdered sugar
• 1/3 cup strawberry jam

While the cookies cool, beat the softened butter in a clean bowl on medium-high speed for 2-3 minutes until it’s pale and fluffy.

Gradually add the sifted powdered sugar in three additions, beating well between each addition to avoid lumps.

Once all the sugar is incorporated, add the strawberry jam and beat until you have a smooth, spreadable frosting.

The jam not only provides authentic Neapolitan flavor but also adds moisture that keeps the frosting from being too stiff.

I use Smuckers jam because the consistency is reliable and the flavor is consistently delicious.

Step 6: Assemble the Cookie Sandwiches

• Cooled cookies from Step 4
• Strawberry buttercream from Step 5

Transfer the strawberry buttercream to a piping bag fitted with a round tip.

Lay out all your cooled cookies flat-side up.

Pipe a generous dollop of frosting onto half of the cookies (you should have roughly equal numbers of vanilla and chocolate cookies to work with).

Top each frosted cookie with one of the remaining unfrosted cookies, pressing gently so the frosting spreads to the edges.

The result is a beautiful Neapolitan effect with vanilla cookie, strawberry frosting, and chocolate cookie in every bite.