Make a moist black velvet Halloween cake with black cocoa, tangy cream cheese frosting, and an easy spiderweb design. Includes detailed baking tips!

Slice into this black velvet Halloween cake and you get soft, almost-black chocolate layers tucked beneath a thick sweep of tangy cocoa cream cheese frosting, with a little white spiderweb making every slice feel ready for a Halloween party!

What Does Black Velvet Halloween Cake Taste Like?

Think of a tender chocolate layer cake with a chocolate cookie character, a gentle buttermilk tang, and creamy frosting that melts against each bite.

Black cocoa gives it a distinctive roasted flavor, while a smaller amount of regular Dutch-process cocoa adds a rounder chocolate taste, so that dark color comes with plenty of flavor behind it.

Ingredients

For the Black Velvet Cake

• 2 cups all-purpose flour (240 g)
• ⅔ cup black cocoa powder (about 60 g): Unsweetened, sifted to remove lumps.
• ¼ cup Dutch-process cocoa powder (20 g): Unsweetened.
• 1¾ cups granulated sugar (350 g)
• 2 teaspoons baking powder
• ½ teaspoon baking soda
• ¾ teaspoon fine salt
• 2 large eggs
• 1 cup cultured buttermilk (240 ml)
• ½ cup neutral oil (120 ml)
• ¼ cup unsalted butter (56 g)
• 2 teaspoons vanilla extract.
• ¾ cup hot brewed coffee (180 ml)

For the Black Cocoa Cream Cheese Frosting and White Web

• 1 cup unsalted butter (226 g)
• 8 ounces full-fat brick-style cream cheese (226 g)
• 4 cups powdered sugar (480 g)
• 2 teaspoons vanilla extract.
• ¼ teaspoon fine salt.
• ⅔ cup black cocoa powder (about 60 g)
• 1 to 3 teaspoons milk, only if needed
• Black gel food coloring, optional: A tiny amount at a time, only if you want a stronger black finish than your cocoa provides.

The frosting quantity allows for filling, a thin crumb coat, a moderate outer coating, and a piped white web. It does not include enough for a thick border of large rosettes.

Yield: One two-layer, 8-inch round cake.

Servings: 16 slices.

How to Make Black Velvet Halloween Cake 

Preheat your oven to 350°F (175°C) and position a rack near the middle, then lightly grease two 8-inch round cake pans and line their bases with parchment circles. Give parchment a light coating of grease as well, making sure it lies flat against each pan.

I would not skip those circles, because a tender chocolate layer deserves a clean exit from its pan, and frosting should not have to serve as emergency construction material!

Sift black cocoa and Dutch-process cocoa into a heatproof bowl, pour in ¾ cup hot coffee, and whisk until you have a thick, smooth chocolate mixture without dry pockets hiding around the edges.

Let it stand for about 5 minutes while you measure other ingredients, then whisk in room-temperature buttermilk, which loosens this mixture and helps cool it.

It should feel lukewarm before it meets eggs; if your bowl still feels distinctly hot, give it another few minutes.

This short hydration step helps disperse cocoa evenly, so every bite has a smooth chocolate flavor instead of a dusty little cocoa lump.

In a large mixing bowl, whisk flour, sugar, baking powder, baking soda, and salt until evenly combined, taking a moment to break up any visible clumps.

In a separate bowl, whisk eggs with oil, melted butter, and vanilla until smooth, then whisk in your lukewarm cocoa and buttermilk mixture. Scrape around the cocoa bowl with a spatula so all that dark chocolate mixture makes it into your batter.

Pour wet ingredients into dry ingredients and whisk gently, just until flour disappears, then switch to a spatula and scrape along the bottom and sides of your bowl.

Stop once everything is evenly mixed, even if batter looks much looser than a butter cake batter, because this is meant to be pourable.

Resist adding extra flour to thicken it; that tempting little adjustment can turn a tender cake into a slice that needs an unusually large glass of milk.

Divide batter evenly between prepared pans, using a scale if available so both layers bake at a similar pace; expect roughly 730 to 750 g per pan, with small differences depending on ingredients.

Smooth their surfaces lightly and tap each pan gently once against your counter to release any particularly large air pockets, then place them side by side in your oven with space between them for heat to circulate.

Each pan should remain comfortably below two-thirds full, and batter should go into your preheated oven promptly after mixing.

Bake for 35 to 42 minutes, beginning your first check at 35 minutes rather than repeatedly opening the door earlier.

Because these layers are dark, browning will not tell you much, so look for a set surface that springs back gently when touched and a toothpick inserted into each center that comes out clean or with a few moist crumbs, but no glossy batter.

If a center still looks wet or jiggles, bake for another 3 minutes and check again; remove each layer when it is ready, even if its companion needs a little longer. Ovens and pans vary, so those cues matter more than making both cakes match a timer exactly.

Set pans on cooling racks for 15 minutes, then gently loosen edges with a thin spatula, turn layers out, peel away parchment, and carefully return them right-side up to finish cooling.

Allow another 1½ to 2 hours, or longer in a warm kitchen, until their centers and undersides feel completely cool.

My strongest advice is to be patient here, because even a slightly warm layer can soften cream cheese frosting enough to send your upper layer sliding sideways, which is more suspense than dessert needs!

When layers are nearly cool, beat softened butter for frosting on medium speed for about 2 minutes, until smooth and a little lighter in texture, then add softened cream cheese and mix for only 30 to 60 seconds, just until combined.

Both ingredients should feel cool and pliable rather than greasy or almost melted, and scraping your bowl now helps prevent small lumps later.

Add powdered sugar in three additions on low speed, followed by vanilla and salt, mixing only until frosting is smooth rather than whipping it for several minutes after cream cheese goes in.

Scoop ¼ cup of this pale frosting, about 60 g, into a small covered bowl and refrigerate it for your spiderweb, then sift black cocoa into remaining frosting and mix on low just until evenly incorporated.

Scrape your bowl again and check consistency with a spatula: frosting should spread smoothly while holding a soft ridge, rather than running back into a puddle.

If it feels too stiff, add milk 1 teaspoon at a time, using only what is needed; if it feels loose, refrigerate for 15 to 20 minutes, then stir gently and check again before adding anything else.

Give cocoa frosting a covered 20-minute rest in the refrigerator while you finish preparing cooled layers, then stir it gently and let it soften briefly if it has become too firm to spread.

Freshly mixed frosting may look charcoal rather than black, and its shade can deepen as it rests, so judge its color after this pause before adding optional black gel coloring a tiny amount at a time.

Exact color varies with cocoa brand and lighting; avoid adding extra spoonfuls of cocoa simply to force a darker shade, because that also changes frosting’s flavor and texture.

If cooled layers have pronounced domes, trim just their raised tops with a long serrated knife, keeping your cuts level and leaving as much cake intact as possible.

Put a small dab of black frosting on a cake plate, settle your first layer over it, and spread about 1 cup frosting, roughly 230 to 250 g, across its surface in an even layer.

Place your second layer on top with its flat bottom facing upward, check that edges line up, and press very gently so everything sits securely without squeezing filling out of the sides.

Spread a thin coat of black frosting over the top and sides to catch loose crumbs, then refrigerate your cake for 20 minutes, until this coating feels firm enough that a light touch does not pull it away.

This is a useful pause, so keep remaining frosting covered and use a few minutes to clear your counter or prepare your piping bag.

Once that first coat has set, spread remaining black frosting over your cake, making the top reasonably smooth and leaving soft swoops around the sides if you like.

Take reserved white frosting from your refrigerator and stir until it is soft enough to pipe, allowing a few minutes at room temperature if necessary; add just a few drops of milk only if it remains too stiff.

Spoon it into a piping bag with a small round tip, or a zip-top bag with a very small corner snipped off, and practice a short line on a plate before starting.

Pipe eight thin lines from the center of your cake toward its edge, like spokes, then connect neighboring lines with shallow curves in three rings to create a spiderweb.

Keep pressure gentle and steady, and remember that slightly uneven lines still look like a web, especially once everyone notices chocolate cake underneath!

Refrigerate your finished cake for at least 30 minutes to help frosting set before slicing, then let it stand at room temperature for about 20 to 30 minutes before serving so its crumb softens and frosting becomes creamy.

For tidy slices, dip a sharp knife into hot water, wipe it completely dry, and clean it between cuts, working your way around the cake until you have 16 portions.

Keep total time outside refrigeration in mind, including decorating and serving, as explained in the storage notes below.

Serving Suggestions

Serve this cake slightly cool rather than straight from a long stay in your refrigerator, when butter in both cake and frosting will feel firmer.

A few fresh raspberries or blackberries alongside each slice add a tart contrast, while a small scoop of vanilla ice cream makes a lovely addition if you want an extra dessert-table flourish.

For drinks, a cup of coffee works well with its cocoa flavor, and cold milk is an excellent match for that chocolate cookie character.

On a Halloween dessert table, I would cut 16 modest slices first and let anyone who wants a larger serving come back for more, especially if candy, cookies, and other treats are also making an appearance!

Bring this black velvet Halloween cake to your table with its white web stretched across dark cocoa frosting, then cut through those soft layers and let creamy chocolate crumbs do the convincing!

Between its chocolate cookie flavor, gentle buttermilk tang, and buttery cream cheese finish, each slice gives you a Halloween dessert worth sitting down to enjoy, even if a small crowd has already gathered beside your cake stand with forks.