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3 Layer Chocolate Buttercream Cake

There is nothing quite like a tall, decadent 3 Layer Chocolate Buttercream Cake sitting in the center of the dessert table. Three layers of moist chocolate cake are stacked with generous layers of creamy chocolate buttercream, then the entire cake is covered in even more rich chocolate frosting.

This is the chocolate cake you make when you want something impressive.

The cake layers are deeply chocolatey, soft, and moist, while the homemade chocolate buttercream is smooth, fluffy, and rich without overpowering the cake. When you cut the first slice, you get those gorgeous alternating layers of dark chocolate cake and silky frosting.

Whether you’re making a chocolate birthday cake, celebrating a special occasion, or simply looking for a classic chocolate layer cake, this is the kind of recipe you’ll want to keep.

Why You’ll Love This Chocolate Layer Cake

This cake looks like it came from a bakery, but everything can be made right in your own kitchen.

You’ll love it because it’s:

• Three beautiful layers tall
• Rich and intensely chocolatey
• Soft and moist
• Filled with chocolate buttercream
• Covered in homemade chocolate frosting
• Easy to decorate simply or elaborately
• Perfect for birthdays and celebrations
• A showstopper on a dessert table

And while a three-layer cake looks impressive, assembling one is much easier than you might think.

Ingredients for 3 Layer Chocolate Cake

Chocolate Cake

• 2 1/2 cups all-purpose flour
• 2 1/2 cups granulated sugar
• 1 cup unsweetened cocoa powder
• 2 1/2 teaspoons baking soda
• 1 1/2 teaspoons baking powder
• 1 teaspoon salt
• 3 large eggs
• 1 cup buttermilk
• 1 cup vegetable oil
• 2 teaspoons vanilla extract
• 1 1/4 cups hot coffee

Chocolate Buttercream

• 2 cups unsalted butter, softened
• 6 cups powdered sugar
• 1 cup unsweetened cocoa powder
• 2 teaspoons vanilla extract
• 1/2 teaspoon salt
• 6–8 tablespoons heavy cream or milk

Why Add Coffee to Chocolate Cake?

Don’t worry—this isn’t a coffee-flavored cake.

Hot coffee helps deepen the flavor of cocoa, making the finished cake taste even more intensely chocolatey.

If you don’t want to use coffee, you can substitute hot water, but coffee gives chocolate cake an especially rich flavor.

How to Make a 3 Layer Chocolate Cake

Prepare the Cake Pans

Preheat the oven to 350°F.

Grease and flour three 8-inch round cake pans. For easier removal, line the bottoms of the pans with circles of parchment paper.

Set the prepared pans aside.

Combine the Dry Ingredients

In a large mixing bowl, whisk together the flour, granulated sugar, cocoa powder, baking soda, baking powder, and salt.

Break up any lumps of cocoa so the dry ingredients are evenly combined.

Add the Wet Ingredients

Add the eggs, buttermilk, vegetable oil, and vanilla.

Mix until everything is combined.

Slowly pour in the hot coffee while mixing on low speed.

The batter will be relatively thin. That’s exactly what you want. A thinner chocolate cake batter helps create beautifully moist cake layers.

Divide the Batter

Divide the chocolate cake batter evenly between the three prepared cake pans.

For the most evenly sized layers, you can weigh the filled pans with a kitchen scale as you divide the batter.

Bake

Bake the cake layers at 350°F for approximately 25–30 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.

Avoid overbaking. That’s one of the easiest ways to turn a wonderfully moist chocolate cake into a dry one.

Let the cakes cool in their pans for about 10–15 minutes.

Carefully turn them out onto cooling racks, remove the parchment paper, and allow them to cool completely.

How to Make Chocolate Buttercream

While the cakes cool, make the chocolate buttercream.

Place the softened butter in a large mixing bowl and beat for approximately 3–4 minutes, until pale, creamy, and fluffy.

Add the powdered sugar and cocoa powder gradually, mixing on low at first so the dry ingredients don’t fly everywhere.

Add the vanilla and salt.

Begin adding heavy cream one tablespoon at a time until the frosting reaches a smooth, spreadable consistency.

Once everything is incorporated, beat the buttercream for another 2–3 minutes until light and fluffy.

How to Assemble a 3 Layer Cake

Make sure your cake layers are completely cool before you begin.

If the tops have domed significantly, use a serrated knife or cake leveler to carefully trim them so you have relatively flat layers.

Place the first chocolate cake layer on a cake stand or serving plate.

Spread a generous layer of chocolate buttercream across the top.

Add the second cake layer.

Spread another generous layer of buttercream over it.

Place the third chocolate cake layer on top.

Now you have that beautiful three-layer cake.

Frost the Cake

Once the crumb coat has chilled, spread the remaining chocolate buttercream over the top and sides of the cake.

You can smooth the frosting with a cake scraper for a polished bakery-style finish or leave beautiful swoops and swirls in the buttercream for a softer homemade look.

I especially love a chocolate cake with plenty of visible buttercream texture. It makes the cake look rich and inviting without requiring complicated decorating techniques.

Decorating a Chocolate Buttercream Cake

A beautiful chocolate cake doesn’t need elaborate decorations.

Try finishing it with chocolate curls, chocolate shavings, chocolate chips, chocolate sprinkles, fresh strawberries, raspberries, chocolate-covered strawberries, piped buttercream, or a chocolate ganache drip.

Or leave it completely chocolate.

A tall three-layer cake covered in rich chocolate buttercream is impressive all on its own.

How to Make a Moist Chocolate Cake

There are a few little things that make a big difference.

Use oil. Vegetable oil helps keep chocolate cake exceptionally moist, even after refrigeration.

Use buttermilk. The acidity and richness of buttermilk contribute to a soft, tender cake.

Don’t skip the hot coffee. It enhances the cocoa and contributes additional liquid to the batter.

Measure flour carefully. Too much flour can make cake dense or dry. Spoon the flour into your measuring cup and level it rather than packing it in.

Don’t overbake. Start checking the cakes toward the beginning of the suggested baking range.

Cool completely before frosting. Buttercream and warm cake do not mix.

What Makes Chocolate Buttercream Fluffy?

The butter should be properly softened—not cold and not melted.

Beat the butter by itself before adding the other ingredients. This incorporates air and gives you a lighter base for the frosting.

Then beat the completed frosting for another few minutes.

Heavy cream can make the buttercream especially luxurious and fluffy.

What If My Chocolate Buttercream Is Too Thick?

Add heavy cream or milk one tablespoon at a time until you reach the consistency you want.

It’s much easier to thin buttercream gradually than to fix frosting that’s become too thin.

What If My Buttercream Is Too Thin?

Add a little more powdered sugar.

If your kitchen is particularly warm and the butter itself has become too soft, refrigerating the frosting briefly may also help it firm up.

How Much Frosting Do I Need for a 3 Layer Cake?

A tall three-layer cake needs quite a bit of frosting because you’re filling two layers as well as covering the top and sides.

This recipe makes a generous batch of chocolate buttercream so you don’t find yourself trying to stretch a tiny amount of frosting across a large cake.

And in my opinion, a chocolate buttercream cake should have plenty of buttercream.

How to Get Even Cake Layers

Divide your batter as evenly as possible between the three pans.

A kitchen scale makes this incredibly easy.

Place an empty prepared pan on the scale, tare it to zero, and add batter. Repeat with the other pans until they contain approximately equal amounts.

Even cake layers bake more consistently and make the finished cake look much more professional when sliced.

Can I Make the Cake Layers Ahead?

Yes, and this can make assembling a layer cake much easier.

Bake the cake layers, allow them to cool completely, and wrap each layer tightly.

The layers can be made a day ahead and kept appropriately covered.

You can also freeze unfrosted cake layers. Wrap them well to protect them from freezer burn, then thaw before assembling.

Can I Make Chocolate Buttercream Ahead?

Yes.

Chocolate buttercream can be made ahead and refrigerated in an airtight container.

Before frosting the cake, allow it to soften at room temperature and beat it again until light and spreadable.

You may need a small splash of cream to restore the perfect consistency.

How to Store Chocolate Layer Cake

Keep the finished cake covered so the exposed cake doesn’t dry out.

If your room is cool, a buttercream-covered cake can generally be kept at room temperature for a short period. For longer storage, refrigerate it.

For the best texture, allow refrigerated cake slices to sit at room temperature briefly before serving. Buttercream becomes much softer and creamier as it warms.

Can You Freeze Chocolate Cake?

Yes.

The easiest option is to freeze the unfrosted cake layers.

Once completely cool, wrap each layer tightly and freeze.

You can also freeze individual slices of finished cake. Wrap them carefully and place them in a freezer-safe container.

Thaw in the refrigerator and then bring closer to room temperature before serving.

What to Serve With Chocolate Cake

This cake is rich enough to stand alone, but it’s especially delicious with:

• Vanilla ice cream
• Fresh strawberries
• Raspberries
• Whipped cream
• Hot fudge
• Caramel sauce
• Fresh coffee
• Cold milk

For birthdays, add candles and call it done.

Perfect for Birthdays and Celebrations

There’s a reason chocolate birthday cake never really goes out of style.

A tall three-layer chocolate cake immediately feels celebratory, whether you’re making it for a child’s birthday, an adult birthday, anniversary, Valentine’s Day, Mother’s Day, Father’s Day, graduation, or holiday.

And because the decoration is so easy to change, the same basic cake can work for almost any occasion.

Frequently Asked Questions

Can I make this chocolate cake without coffee?
Yes. Substitute an equal amount of hot water. Coffee enhances the chocolate flavor, but the cake will still work without it.

Does the chocolate cake taste like coffee?
No. The coffee primarily intensifies the chocolate flavor rather than making the finished cake taste like a cup of coffee.

Can I use 9-inch cake pans?
Yes, although the layers will be slightly thinner and may bake more quickly. Begin checking them earlier.

Why is my chocolate cake batter thin?
That’s normal for this recipe. Don’t add extra flour just because the batter looks thinner than traditional cake batter.

Can I use regular milk instead of buttermilk?
Buttermilk is recommended for the intended texture and flavor. If you don’t have any, you can use a homemade buttermilk substitute.

How do I keep a three-layer cake from sliding?
Make sure the cake layers are completely cool and your buttercream isn’t too warm or thin. If the cake begins shifting while assembling, refrigerate it briefly before continuing.

Do I really need a crumb coat?
You don’t absolutely have to use one, but it makes achieving a clean final frosting layer much easier.

Prep Time: 30 minutes
Bake Time: 25–30 minutes
Cooling & Decorating Time: About 1 1/2 hours
Total Time: About 2 1/2 hours
Yield: 12–16 servings
Cake Pans: Three 8-inch round pans