Raspberry Chocolate Cake with Raspberry Buttercream & Ganache

There is something truly magical about the combination of tart berries and rich cocoa. This raspberry chocolate cake brings together moist, coffee-infused chocolate layers, a bright homemade jam filling, vibrant pink raspberry buttercream, and a glossy dark chocolate drip. Don't let the multiple components intimidate you—take it one step at a time, and you will have a bakery-worthy masterpiece ready to share.

Why You'll Love This Recipe

• Uses hot coffee to bloom the cocoa powder, creating an intensely deep chocolate flavor without any coffee taste.
• Features a real fruit raspberry jam filling that cuts through the rich sweetness of the cake and frosting.
• Uses freeze-dried raspberry powder to deliver a vibrant pink color and intense natural berry flavor to the buttercream.
• A glossy dark chocolate ganache drip adds a professional finish that is surprisingly simple to pour.

Ingredients You'll Need (and Why)

Dutch-process cocoa powder: Washed with an alkali to neutralize its acidity, Dutch-process cocoa gives the cake a smoother, deeper chocolate flavor and a darker color than natural cocoa.

Buttermilk: The acid in buttermilk reacts with the baking soda to create a tender, fluffy crumb while adding subtle moisture to the cake layers.

Hot brewed coffee: Hot liquid blooms the cocoa powder, releasing its volatile flavor compounds and making the chocolate taste significantly richer without adding a coffee flavor.

Cornstarch slurry: Dissolving cornstarch in water before adding it to the simmering raspberries prevents lumps and thickens the fruit into a stable filling that won't leak out of the cake layers.

Freeze-dried raspberry powder: Unlike liquid extracts or fresh purée (which can add too much moisture), raspberry powder packs an intense punch of concentrated tart flavor and vibrant color without thinning the buttercream.

How to Make It

Baking the Chocolate Layers

The foundation of this cake is a wonderfully moist, pourable batter. Because the batter is quite thin, don't be alarmed—that extra moisture is precisely what keeps the crumb tender. Whisking the dry ingredients thoroughly ensures the leaveners are evenly distributed, and adding hot coffee at the very end wakes up the cocoa for a deep, complex chocolate profile.

Preparing the Components

While your cake layers bake and cool, you'll want to prep the filling and frosting. Cooking the raspberries with sugar, lemon juice, and a cornstarch slurry creates a glossy, jammy compote that must cool completely before touching the buttercream. Meanwhile, beating your butter until very pale and fluffy before adding the powdered sugar guarantees a silky-smooth raspberry buttercream.

Assembly, Drip & Decor

Building a layered cake with fruit filling requires a simple structural trick: the buttercream dam. Piping a ring of frosting around the edge of each layer acts as a wall, keeping the jam securely in the center so it doesn't squish out. Once stacked and frosted, a brief chill prepares the cake for a smooth dark chocolate ganache drip that cascades down the chilled sides.

Success Tips

• Do not rush the cooling process: both the cake layers and the raspberry filling must be completely at room temperature before you start assembly, otherwise the butter in your frosting will melt.
• When making the buttercream dam, make sure the circle of frosting is tall and sturdy enough to hold the weight of the jam without letting it leak into the outer frosting layer.
• Chill the assembled frosted cake for 30 minutes before adding the ganache drip. A cold cake helps stop the warm ganache from running all the way down to the base in an uncontrolled puddle.

Variations

• If you cannot find freeze-dried raspberry powder, you can reduce fresh raspberry puree down in a saucepan until thick, cool it completely, and use it in place of the powder in your buttercream.

Storage & Make-Ahead

Room temperature: Keep covered at room temperature for up to 1 day if your kitchen is cool.

Fridge: Store in an airtight cake container in the refrigerator for up to 4 days. Bring slices to room temperature before serving for the best soft texture.

Freezer: Unfrosted cake layers can be wrapped tightly in plastic wrap and frozen for up to 2 months.

FAQ

Can I use water instead of coffee for the cake batter?

Yes, you can substitute hot water for the hot coffee. However, the coffee flavor bakes out completely and simply enhances the richness of the chocolate, so you won't taste coffee at all!

Why did my buttercream separate or curdle?

This usually happens if your butter was too warm (greasy) or your heavy cream was too cold when added. If it looks curdled, beat it on medium-high speed for another 2–3 minutes, or warm a small portion of the bowl with your hands while mixing to bring everything to an even temperature.

Can I make the raspberry filling ahead of time?

Yes! You can make the raspberry filling up to 3 days in advance. Store it in a sealed jar in the refrigerator, and give it a good stir before using.