Black Velvet Cupcakes (Dark Cocoa, Black Buttercream, Ready in 1 Hour 10 Minutes)

These black velvet cupcakes get their dramatic color from black cocoa powder, which bakes into a crumb so dark it looks almost black, with a deep chocolate flavor to match. A swirl of black chocolate buttercream finishes each one, so the whole batch looks striking on a Halloween table without any food coloring tricks beyond the cocoa itself. The cupcakes bake in 20 minutes, cool for 30 minutes, and frost easily, for a total of 1 hour 10 minutes from start to finish.

If you like dark chocolate desserts, try Death by Chocolate Cupcakes and Bloody Red Velvet Cupcakes next, for two more cupcake batches with very different looks.

Why This Recipe Works

• Black cocoa does the coloring: Dutch-processed black cocoa gives a near-black crumb and a smooth chocolate flavor, with no liquid food coloring needed.
• Buttermilk keeps the crumb soft: Buttermilk and oil together keep these cupcakes moist, even after a day in an airtight container.
• Vinegar lifts the texture: A teaspoon of vinegar reacts with the baking soda for a light, tender rise instead of a dense cake.
• The frosting is simple to pipe: Black cocoa buttercream holds a tall swirl without sliding, so the cupcakes look finished with one piping motion.

Ingredients

• 3/4 cup (90 g) all-purpose flour
• 1/3 cup (30 g) black cocoa powder, plus 1/3 cup (30 g) for the frosting
• 1/2 teaspoon (2 g) baking soda
• 1/2 teaspoon (3 g) fine salt
• 3/4 cup (150 g) granulated sugar
• 2 large eggs, room temperature
• 1/3 cup (80 ml) vegetable oil
• 3/4 cup (180 ml) buttermilk, room temperature
• 1 teaspoon (5 ml) white vinegar
• 1 teaspoon (5 ml) vanilla extract
• 3/4 cup (170 g) unsalted butter, room temperature, for the frosting
• 2 1/2 cups (300 g) powdered sugar, for the frosting
• 1/3 cup (80 ml) heavy cream, for the frosting

(full list in card)

How to Make Black Velvet Cupcakes

Step 1: Mix the batter

Heat the oven to 350°F (175°C) and line a 12-cup muffin pan with paper liners. Whisk the flour, 1/3 cup black cocoa, baking soda, and salt in a bowl. In a second bowl, whisk the sugar, eggs, oil, buttermilk, vinegar, and vanilla until smooth, then stir the dry mixture into the wet mixture until just combined.

Step 2: Fill and bake

Divide the batter evenly among the liners, filling each about two-thirds full. Bake for 18 to 20 minutes, until a toothpick inserted in the center comes out with a few moist crumbs. Cool the cupcakes in the pan for 10 minutes, then move them to a wire rack.

Step 3: Make the black buttercream

Beat the butter in a bowl until smooth and creamy, then beat in the remaining 1/3 cup black cocoa and the vanilla. Add the powdered sugar in two batches, alternating with the cream, and beat until the frosting is dark, smooth, and thick enough to hold a swirl. Add cream a teaspoon at a time if it is too stiff.

Step 4: Cool fully and frost

Cool the cupcakes completely, about 30 minutes total cooling time, before frosting. Pipe or spread the buttercream in tall swirls over each cupcake and serve, or store them as directed below.

Tips

• Sift the cocoa: Black cocoa clumps easily, so sift it with the flour to avoid dark specks in the batter and frosting.
• Do not overmix: Stir until the flour just disappears. Overmixing develops gluten and turns the crumb tough instead of tender.
• Use room-temperature ingredients: Room-temperature eggs and buttermilk blend evenly into the batter, which helps the cupcakes rise level.
• Frost only cooled cupcakes: Warm cupcakes melt buttercream on contact, so wait until they feel cool to the touch all over.

Storage

Store frosted cupcakes in an airtight container at room temperature for up to 2 days, or refrigerate for up to 4 days and bring them back to room temperature before serving. Unfrosted cupcakes freeze well for up to 2 months in a sealed container; thaw at room temperature and frost just before serving.

Frequently Asked Questions

What is black cocoa powder?

Black cocoa is a heavily Dutch-processed cocoa with a very dark color and a smooth, mild chocolate flavor. It is sold in baking aisles and online; regular Dutch-processed cocoa gives a dark brown cupcake, but not the near-black color of this recipe.

Can I make these cupcakes without buttermilk?

Yes. Stir 1 tablespoon (15 ml) of lemon juice or white vinegar into 3/4 cup (180 ml) of whole milk, let it stand for 5 minutes, and use it in place of the buttermilk. The crumb will be very close to the original.

Why did my cupcakes sink in the middle?

Sinking usually comes from underbaking or from opening the oven door early. Bake until a toothpick shows a few moist crumbs, not wet batter, and keep the oven closed for the first 15 minutes.

Can I color the frosting without black cocoa?

You can tint plain chocolate buttercream with black gel food coloring, but the color will be softer and grayer than cocoa-based frosting. For the darkest result, use the black cocoa in the frosting as written.