There’s something so delicious about rich chocolate and sweet, juicy berries. While I’ve made a chocolate raspberry cake and a chocolate strawberry cake before, I realized that I had never made a chocolate blackberry cake!

And it was high time we fixed that. I look forward to blackberry season every year, and I wanted those delicious blackberries to be the star of the show.

I’m happy to report that they totally are in this cake!

It’s made with moist, dark chocolate cake layers, frosted with blackberry and chocolate buttercream, and filled with blackberry buttercream, blackberry jam, and fresh blackberries.

How to Make This Chocolate Blackberry Cake

To make sure your chocolate blackberry layer cake turns out as amazing as possible, let’s walk through each step together!

I’ve also included a video tutorial of the process below.

Step 1: Bake the Dark Chocolate Cake Layers

The first step is to make the dark chocolate cake batter following the recipe card at the bottom of the post.

Divide the batter evenly between the prepared cake pans and bake for 20-22 minutes or until a toothpick comes out with a few moist crumbs.

Remove the cake layers from the oven and let them cool in the pans for about 10 minutes.

Gently run an offset spatula around the rim of the cake pans to loosen them, then flip them into wire racks to finish cooling.

These cake layers bake up pretty flat, so I usually don’t level them. However, you can level them with a serrated knife if you want to!

If you’re making these in advance, you can wrap and freeze them at this point.

Step 2: Make the Blackberry and Chocolate Buttercream

While the cake layers bake and cool, make the blackberry and chocolate buttercream.

I love this recipe because it uses one frosting base to make both flavors of frosting!

I like to use an American buttercream because I think it’s the easiest to make and I love eating it. However, it is quite sweet!

If you want to use a less sweet frosting, I’d recommend making a batch of my Swiss meringue buttercream or my hybrid buttercream.

This frosting can also be made in advance if needed and kept in the fridge for up to a month!

Step 3: Stack and Fill the Cake Layers

Then stack and frost cake layers on a greaseproof cake board. Use a dab of chocolate buttercream to help stick the first cake layer to the board.

Pipe a ring of chocolate buttercream around the perimeter of the cake, then spread about 1/3 cup of blackberry jam on the cake layer inside the buttercream ring.

Top it with a layer of blackberry buttercream (use about 1/5 of the blackberry buttercream) and press a third of the blackberries into the frosting.

Repeat with the remaining cake layers and place the top cake layer upside down to make it easier to frost.

Step 4: Crumb Coat the Cake

Spread a thin coat of chocolate frosting around the cake to fully cover the cake layers.

If you find the cake layers are sliding around, pop the cake into the freezer for 10 minutes to chill the filling and lock the cake layers in place.

Smooth using a bench scraper, then chill the cake in the fridge (10 minutes) or freezer (5 minutes) until the frosting is firm to the touch.

Step 5: Add the Second Layer of Frosting & Decorate

Next, add a second, thicker layer of chocolate frosting to the cake. Add texture to the buttercream by making some swoops with either a large offset spatula or the back of a spoon.

Spread swipes of the remaining blackberry buttercream over the chocolate buttercream and add a ring of buttercream dollops and fresh blackberries around the top of the cake.

Chill the cake until the frosting is firm to the touch, then use a sterile paintbrush to paint the berries and the side of the cake with streaks of edible gold paint or gold luster dust mixed with clear liquor or extract.

This is optional but it really elevates the look of this cake!

Substitutions & Swaps: Dark Chocolate Cake Layers

While I love this cake recipe just the way it is, I know some of you might not have all of these ingredients on hand.

Below are some swaps and substitutions that can be made in this recipe:

• All Purpose Flour – This recipe turns out best with all purpose flour. However, you can swap in a good gluten free flour blend (like this) if needed. Just be sure to stir the batter longer than normal to help give the cake proper structure, and let the batter sit for about 20 minutes before baking it if you opt to make a gluten free version.
• Granulated Sugar – I do not recommend reducing the amount of sugar or changing the type of sugar, as it will change the texture of the cake layers.
• Dark Baking Cocoa – I like to use the Ghirardelli or Hershey’s brand of dark baking cocoa, but you can use any brand of unsweetened cocoa powder. You can also use black cocoa powder.
• Buttermilk – You can also use full fat yogurt, sour cream, whole milk, or an alternative yogurt or milk (almond, soy, oat).
• Vegetable Oil – Any flavorless oil can be used in this recipe. Canola, vegetable, or even sunflower oil would all work great. I don’t recommend olive oil though, as it has a strong flavor and will change the taste of the cake.
• Eggs – This recipe uses 2 large eggs. If you have an egg allergy you can try using a vegan egg replacer.

Substitutions & Swaps: Blackberry and Chocolate Buttercream

Below are some swaps and substitutions that can be made in this buttercream recipe.

• Unsalted Butter – If you only have salted butter on hand, you can use it in place of the unsalted butter. Just be sure to omit the salt that this frosting recipe calls for. You can also use vegan butter in its place!
• Blackberry Jam – You can use seedless or regular blackberry jam. I like to use my own blackberry jam, but store bought is fine too!
• Dark Baking Cocoa – I like to use the Ghirardelli or Hershey’s brand of dark baking cocoa, but you can use any brand of unsweetened cocoa powder. You can also use black cocoa powder.
• Heavy Cream – Whole milk or alternative milk (soy, almond, oat) can also be used to make the frosting.
• Dark Chocolate Chips – You can use chocolate chips, baking chocolate, or good-quality chocolate bars to melt and add into the frosting. I like to use dark chocolate, but you can also use milk or semi-sweet chocolate if you have a strong preference.

Making This Chocolate Blackberry Cake in Different Sizes

I used 8″ cake pans to make this cake, but this recipe can be used to make different sized cakes. You can also half or double the ingredients to make a half or double batch!

You can make four 7″ or 6″ cake layers with one batch of batter. Bake the cake layers at 350 F / 175 C for 23-28 minutes or until a toothpick comes out with a few moist crumbs. The cake will end up being quite a bit taller than mine.

One batch of batter can also be used to make one 9×13-inch sheet cake. Bake it at 350 F / 175 C for 35-45 minutes and use flower nails or heating cores to help the cake bake evenly. It should end up being about 2 inches tall.

If you want to make cupcakes, I highly recommend using my chocolate cupcake recipe as a base! One batch makes 12 moist chocolate cupcakes, which can be filled with blackberry jam.

Making This Chocolate Blackberry Cake in Advance and Storage Tips

Make your cake layers up to a month in advance and freeze them. It breaks the process up and makes it more approachable.

Make the frosting ahead of time or save any leftover frosting! It can be stored in an airtight container in the fridge for up to a month.

This frosting can also be stored in the freezer for up to 3 months. Just be sure to give it a good stir once it thaws to make it nice and smooth again.

A frosted cake can last in the fridge for 3 days. However, I recommend waiting to add the blackberries to the top of the cake until the day you plan to serve the cake.

Tips for Making the Best Chocolate Blackberry Cake

• Ingredients at room temperature mix together better! Set out any cold ingredients ahead of time.
• Properly measure your cake flour (spoon into the cup measure, then level). Or better yet, use a kitchen scale to measure your dry ingredients.
• Mix your cake batter just until the ingredients are incorporated. This will ensure your cake layers are tender and fluffy.
• Use a scale to weigh your cake pans as you fill them. Make sure each pan has the same amount of batter will make your cake layers bake to the same height and bake more evenly.
• Bang your cake pans on the counter before putting it in the oven. This brings any air bubbles that are trapped in the batter to the surface.
• Chill your cake layers in the freezer for about 20 minutes before assembling the cake. It makes it so much easier to stack and frost them!

Let Me Know What You Think

If you try this chocolate blackberry cake recipe, I’d love to hear what you think! Please leave a rating and comment below.

And don’t forget to tag me @chelsweets and #chelsweets so that I can see your delicious creations!

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