Chocolate Orange Cake

Moist chocolate orange cake made with fresh orange zest, rich cocoa powder, and layered with creamy chocolate orange custard filling. This homemade cake recipe is ideal for birthdays, holidays, and special occasions. Includes instructions for a dark chocolate ganache infused with orange. A bakery-style dessert with bold citrus flavor and smooth texture, made from scratch with simple ingredients.

A rich and moist chocolate cake infused with fresh orange zest and layered with silky chocolate orange custard filling. Finished optionally with a citrus-kissed ganache, this cake is a stunning centerpiece for any celebration.

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Ingredients

For the Chocolate Orange Cake

• 3 cups all-purpose flour
• 3 cups white sugar
• 4 large eggs
• 1 ⅓ cups Dutch-processed cocoa powder
• 1 cup vegetable oil
• 1 ¼ cups milk
• Zest and juice of 2 oranges (about ¼ cup juice)
• 1 teaspoon salt
• 2 teaspoons baking powder
• 1 teaspoon vanilla extract
• ⅓ cup hot water

For the Chocolate Orange Filling

• 2 ½ cups whole milk
• ½ cup white sugar
• 5 large egg yolks
• 1 tablespoon all-purpose flour
• 2 tablespoons cornstarch
• 2 teaspoons vanilla extract
• Zest and juice of 1 orange
• 150g dark chocolate, melted
• ⅓ cup Dutch-processed cocoa powder
• 3 sticks (340g) unsalted butter, at room temperature
• 1 ½ cups icing sugar

Optional: Orange-Infused Chocolate Ganache

• 1 cup chopped chocolate (milk, dark, or semi-sweet)
• ½ cup whipping cream
• Zest and peel of 1 orange

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Instructions

1. Make the Chocolate Orange Cakes

1. Preheat oven to 350°F (180°C). Grease and line two 8-inch cake pans.
2. In a large bowl, combine orange zest and juice.
3. Add flour, sugar, eggs, cocoa powder, oil, milk, salt, baking powder, and vanilla to the bowl.
4. Mix until smooth and lump-free.
5. Pour in the hot water and mix until fully incorporated.
6. Divide batter evenly between the two pans and bake for 30–40 minutes, or until a toothpick inserted comes out clean.
7. Allow cakes to cool completely before assembling.

2. Make the Chocolate Orange Custard

1. In a saucepan, combine milk, vanilla, orange zest, and 2 tablespoons of the sugar. Warm gently over low heat.
2. In a separate bowl, whisk egg yolks with remaining sugar, flour, and cornstarch.
3. Temper the yolks: gradually whisk warm milk into the egg mixture in small increments.
4. Return everything to the saucepan and cook over medium heat, whisking constantly until thickened.
5. Once thick, strain the custard into a clean bowl to remove zest and any lumps.
6. Stir in the melted chocolate until fully incorporated.
7. Cover with plastic wrap pressed directly onto the surface. Cool completely (about 2 hours).

3. Prepare the Chocolate Orange Filling

1. In a stand mixer, beat butter and icing sugar until light and fluffy.
2. Add cocoa powder and 2–3 tablespoons orange juice; mix until combined.
3. Switch to a whisk attachment and gradually add the cooled custard one tablespoon at a time, whipping between additions until thick and smooth.

4. (Optional) Make the Orange-Infused Ganache

1. Place chopped chocolate in a heatproof bowl.
2. In a small saucepan, combine cream, orange zest, and orange peel. Heat until just simmering.
3. Strain hot cream over the chocolate. Let sit for a minute, then stir until glossy and smooth.
4. Allow ganache to cool and thicken before using to glaze or drizzle.

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Tips

• Use room temperature ingredients for smoother mixing and better texture.
• Dutch-processed cocoa gives a deeper chocolate flavor and darker color.
• Strain the custard to ensure a silky filling free from zest or lumps.
• The ganache thickens as it cools—chill slightly if you want a spreadable consistency.

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Variations and Substitutions

• Oranges: Blood oranges or mandarins can be used for a unique twist.
• Filling: Swap the custard for orange curd if you prefer a tangier profile.
• Ganache: Use white chocolate for a lighter finish.
• Cake Format: Bake as cupcakes or a sheet cake and fill using a piping bag.

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FAQs

Can I make the cake layers ahead of time?
Yes, bake the cakes up to two days in advance and store tightly wrapped at room temperature or freeze for longer storage.

Can I skip the ganache?
Absolutely. The cake and filling are flavorful enough on their own, but ganache adds a polished finish.

How do I know when the custard is done?
It should coat the back of a spoon and leave a clear line when you run your finger through it.

Can I use orange extract instead of fresh oranges?
Yes, use about ½–1 teaspoon of orange extract per orange, but fresh zest gives the best flavor.

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Serving Suggestions

• Serve chilled or at room temperature with coffee or tea.
• Garnish with candied orange peel or chocolate curls for a festive touch.
• Add a scoop of vanilla ice cream for a decadent dessert.

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Why You’ll Love This Recipe

• Balanced flavor from real orange zest and rich dark chocolate
• Moist and fluffy cake with a silky custard-based filling
• Elegant and show-stopping, yet easy to make ahead
• Great for birthdays, holidays, or any celebration