Easy Halloween Ghost Cake

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This Halloween cake has three dark chocolate layers made with black cocoa, a naturally purple blackberry buttercream, fresh berries, and homemade meringue ghosts with chocolate faces. No food coloring, and every part can be made ahead.

Spooky Halloween Cake with Meringue Ghosts

October baking in my kitchen is usually orange. So far this fall, I've made a pumpkin-shaped cake from two Bundt cakes, a pan of pumpkin pie brownies, no-bake pumpkin tiramisu, and a batch of baked pumpkin donuts with maple glaze. By mid-month, I craved a Halloween dessert with zero pumpkin and no hint of orange. Something dark, a little dramatic, and fun to decorate.

So, I baked this spooky Halloween layer cake! The layers are almost black, thanks to a mix of dark cocoa and black cocoa powder. The frosting is deep purple, made from a homemade blackberry reduction. I topped it with blackberries, blueberries, and little meringue ghosts with chocolate faces. 

I have not used any artificial dyes or food coloring. The purple color comes directly from blackberries. I cook down frozen blackberries, strain out the seeds, and simmer the purée until it thickens like jam. The buttercream tastes like real berries, and that tart edge keeps all the chocolate from feeling heavy. The cake layers are black because I use black cocoa.

The ghosts are my favorite part. They're a simple meringue. I pipe them, bake them low and slow, then draw on eyes and mouths with melted chocolate. Each ghost gets its own personality, and kids love helping with the faces. Some come out sweet, some come out a little worried, and every single one gets eaten.

Tell Me More About This Halloween Ghost Cake

• The darkest chocolate cake (black-colored cake layers without food dye): I used a mix of dark cocoa and black cocoa powder in the cake layers. Black cocoa gives the cake its dramatic color, while the dark cocoa keeps the chocolate flavor rich and balanced. If you love a deep chocolate cake, you'll also like my three-layer German chocolate cake.
• Purple frosting from real berries:  No gel coloring. The buttercream gets its color and tangy flavor from a thick, seedless blackberry reduction. It tastes like blackberry jam folded into fluffy vanilla buttercream.
• Moist, tender layers: Sour cream, oil, and hot coffee keep this cake soft for days. The coffee won't make it taste like coffee. It simply makes the chocolate taste more chocolatey, the same way it does in my Black Forest cheesecake.
• Ghosts you can make ahead: The meringue ghosts are made the same way as my classic pavlova, just piped small. Store them in an airtight container for up to a week before decorating.
• Perfect for parties: This cake serves 16, so it's great for a Halloween party, a fall birthday, or a spooky movie night. Pair it with a plate of classic fantasy fudge for a full Halloween dessert table.

Key Ingredients

• Black cocoa: Black cocoa is highly alkalized. It has a very dark color and a flavor similar to an Oreo cookie. I combine it with regular dark cocoa to keep the cake richly chocolatey while still getting strikingly dark layers. Black cocoa is heavily Dutch-processed and gives the cake its deep, almost black color. If you can't find it, use 1 cup of Dutch-process or dark cocoa in total. The cake will be dark brown instead of black.
• Flour: Measure the flour by spooning it into the measuring cup and leveling the top. Scooping directly from the bag can pack too much flour into the cup and make the cake heavier.
• Coffee: The coffee makes the chocolate flavor stronger, but the finished cake does not taste strongly of coffee. You can use plain hot water instead, although the chocolate flavor will be slightly less pronounced.
• Blackberries: I recommend frozen blackberries for the reduction because you'll cook and blend them anyway. Save the best-looking fresh berries for decorating.
• Egg whites: I whip 3 room-temperature egg whites with ¼ teaspoon of cream of tartar for the ghosts. Cream of tartar keeps the meringue stable. You can use carton egg whites for the ghosts if the package says they are suitable for whipping. Use the equivalent of three large egg whites.
• Refer to the Halloween ghost cake recipe card below for the exact ingredient amounts and recipe instructions.

Tips for the Chocolate Cake Layers

• Break up the cocoa lumps. Cocoa powder clumps easily. Whisk the dry ingredients well before the wet ones go in.
• Expect a thin batter: The cake batter is supposed to be quite thin after you add the coffee. Don't worry, this is normal!
• Don't overmix: Mix only until everything is combined. Mixing too long can make the layers less tender.
• Divide the batter evenly: Try to split the batter as evenly as possible so the layers bake at the same rate. If you don't have a kitchen scale, measure the batter into the pans with the same cup or ladle.
• Chill the layers before stacking. Cold cake layers are firmer, easier to trim, and shed fewer crumbs.

Tips for the Blackberry Buttercream

• Cool the reduction completely: The reduction must be thick and completely cold before you add it to the buttercream. A warm or runny reduction can melt the butter and make the frosting difficult to work with.
• Add the reduction a little at a time: Blackberry color varies naturally, so add the reduction gradually. Judge the buttercream by both its color and its consistency (how thick or soft it is).
• Expect a soft purple color: The frosting will usually be a soft mauve or purple rather than a vivid, bright purple.
• Fix soft frosting with the fridge: If the buttercream gets soft after adding the reduction, refrigerate it for 10 to 15 minutes. Then mix it briefly on low speed. I don't recommend adding a lot of extra powdered sugar, because it can make the frosting overly sweet.
• Pipe a buttercream dam. Even though the filling is the same buttercream, a thicker ring around the edge keeps the layers steady and the sides straight.

Tips for the Meringue Ghosts

• Start with a grease-free bowl: Make sure the bowl and whisk are completely free of grease. Even a small amount of fat or egg yolk can stop the whites from whipping properly. I like to wipe everything with a kitchen towel soaked in lemon juice, so I know there are no traces of grease.
• Do the finger test. Rub a bit of meringue between two fingers. If it feels grainy, keep whisking until it's smooth.
• Give the ghosts time. At 200°F (95°C), the meringue dries out more than it bakes. If the ghosts feel sticky or don't lift off the parchment, they need more time.
• Know what "done" looks like: The ghosts should be dry and crisp on the outside with a soft, marshmallowy center. Larger ghosts may need the full baking time and a longer rest in the switched-off oven.
• Be gentle with the faces: Use very light pressure when adding the faces. The shells are delicate and can crack if you handle them too firmly.
• Add the ghosts last: Place the ghosts on the cake shortly before serving. Moisture from the buttercream and fresh fruit will slowly soften the bottoms of the meringues.

Serving Ideas

• Halloween dessert table: Serve it alongside my Mint Chocolate Brownies (that green layer is perfect for Halloween), Baked Pumpkin Donuts with Maple Glaze, and a plate of Pumpkin Chocolate Chip Muffins.
• After a cozy Halloween dinner: It's a fun finale after a big pot of Chicken Pot Pie Soup or my 30-minute Homemade Hamburger Helper, which kids love.
• With extra meringue: Love the ghosts? My Summer Berry Pavlova uses the same meringue basics, just in one big nest.
• Let the chilled cake sit at room temperature for about 30 minutes before slicing. The buttercream softens and the chocolate flavor comes through. I use a long, sharp knife and wipe it clean between cuts for neat slices. Give every slice its own ghost.

Variations

• Two-layer cake: Use two 9-inch (23 cm) pans and bake for 35 to 40 minutes. You'll have extra buttercream for decorating.
• Halloween cupcakes: Fill lined muffin cups two-thirds full and bake at 350°F (175°C) for 18 to 22 minutes. Pipe the buttercream on top and add a small ghost to each one. You'll get about 30 cupcakes.
• Sheet cake: Bake in a 9x13-inch (23x33 cm) pan for 40 to 45 minutes. Frost the top and scatter the ghosts across it.
• Raspberry buttercream: Swap the blackberries for frozen raspberries. The frosting turns a bright pink-red instead of purple.
• Chocolate drip: Pour a thin chocolate ganache over the edge of the chilled cake before you add the berries and ghosts.
• Skip the ghosts: Top the cake with extra berries, chocolate shavings, or black and purple sprinkles.

How to Make Halloween Cake (Step-by-Step Tips)

This is a recipe overview. Scroll up for complete instructions and ingredient amounts in the Halloween ghost cake recipe card above.

• Make the meringue ghosts: Whip the egg whites and cream of tartar to soft peaks, then slowly add the superfine sugar until the meringue is thick and glossy. Pipe tall ghost shapes onto parchment and bake low and slow at 200°F (95°C). Let them dry in the oven, then paint on faces with melted chocolate.
• Make the cake batter: Whisk the dry ingredients, then add the eggs, sour cream, oil, and vanilla. Stream in the hot coffee and mix just until smooth.

• Bake the layers: Divide the batter among three 8-inch pans and bake at 350°F (175°C) for 30 to 35 minutes. Cool completely and chill.

• Make the blackberry reduction: Simmer the blackberries with sugar, blend, strain out the seeds, and cook the purée down until thick and jammy. Let it cool completely.

• Make the buttercream: Beat the butter until pale and fluffy, add the powdered sugar, vanilla, and salt, then mix in the blackberry reduction a spoonful at a time.

• Stack and frost: Level the chilled layers, then stack them with buttercream in between. Add a thin crumb coat, chill, then cover with the rest of the frosting.

• Decorate: Right before serving, pile fresh blackberries and blueberries on top and tuck the meringue ghosts in between.

More Halloween and Fall Desserts

• Pumpkin Shaped Cake (Made with Two Bundt Cakes)
• Pumpkin Brownies
• Baked Pumpkin Donuts with Maple Glaze
• Pumpkin Cream Cheese Bread with Streusel Topping
• Pumpkin Chocolate Chip Muffins
• Chocolate Chip Bundt Cake
• Black Forest Cheesecake