If you’re a fan of chocolate, bananas, and all things indulgent (who isn’t?), then this Double Chocolate Banana Layer Cake is about to become your new go-to dessert. Perfectly sweet, delightfully rich, and just the right balance of flavors, it’s a crowd-pleaser that’s bound to turn any day into a special occasion. Whether you’re hosting a family gathering, celebrating a birthday, or simply craving something sweet after dinner, this cake will not disappoint. Plus, it’s super easy to make, which means more time enjoying the good stuff and less time in the kitchen.

Why You’ll Love This Double Chocolate Banana Layer Cake
Let’s talk about the magic behind this cake. First off, the chocolate banana cake is soft, moist, and packed with the natural sweetness of ripe bananas. Then, when you slather it with a rich, creamy chocolate frosting, you’ve got a match made in dessert heaven. Trust me, it’s the perfect balance of rich chocolate flavor and fruity goodness that makes every bite feel like a little slice of heaven.
Ingredients You’ll Need
For the Chocolate Banana Cake:
- 3 ripe bananas, mashed
- 2 cups all-purpose flour
- ¾ cup unsweetened cocoa powder
- 2 teaspoons baking soda
- 1 teaspoon baking powder
- ½ teaspoon salt
- 2 large eggs
- 1 cup buttermilk
- ½ cup vegetable oil
- 1 teaspoon vanilla extract
- 1 ½ cups granulated sugar
For the Chocolate Frosting:
- 1 cup unsalted butter, softened
- 3 ½ cups powdered sugar
- ¾ cup unsweetened cocoa powder
- ½ cup heavy cream
- 2 teaspoons vanilla extract
- Pinch of salt
For Garnish:
- Chocolate shavings
- Banana slices
How to Make This Delectable Cake
1. Prepare the Cake:
Preheat your oven to 350°F (175°C). Grease and line two 9-inch cake pans so your cake doesn’t stick (trust me, this is an important step!).
In a medium-sized bowl, whisk together the flour, cocoa powder, baking soda, baking powder, and salt. This is your dry mix.
Now, in a larger bowl, beat together the eggs, sugar, buttermilk, vegetable oil, and vanilla extract. Stir in the mashed bananas until everything is well combined. I promise you, the smell of bananas and vanilla will already start making your kitchen smell like a dream.
Gradually add the dry ingredients into the wet ingredients, mixing until just combined. It’s like magic when the chocolatey goodness blends with the banana base!
Pour the batter evenly into the prepared cake pans and pop them in the oven. Bake for 30-35 minutes, or until a toothpick comes out clean when inserted into the center. Allow the cakes to cool completely before frosting—patience here is key!
2. Prepare the Frosting:
In a large bowl, beat the softened butter until it’s light and fluffy (about 2-3 minutes). Then gradually add in the powdered sugar and cocoa powder, mixing well. Pour in the heavy cream, vanilla extract, and salt, and beat until the frosting is smooth and creamy. This frosting is seriously so delicious you might find yourself sneaking a bite before it even makes it to the cake!
3. Assemble the Cake:
Once your cakes are cooled, place one layer on your serving plate. Spread a generous layer of the chocolate frosting over the top of the cake—don’t be shy with it! Add the second layer and frost the top and sides evenly, giving it a nice, smooth finish.
Now comes the fun part—garnish! Add some chocolate shavings and fresh banana slices on top to make it even more gorgeous.
Chill for Best Results
Let the cake sit for about 30 minutes before slicing. This gives everything a chance to set, making sure each piece comes out looking perfect.
Helpful Tips for the Perfect Cake
- Ripe Bananas Are Key: The riper the bananas, the sweeter the cake will be! So don’t be afraid of those overripe bananas sitting on your counter. They’re perfect for this cake.
- Frosting Tip: If you like your frosting a little thicker, just add a bit more powdered sugar. If you prefer a lighter consistency, a bit more cream will do the trick.
- Storage: Keep your cake in an airtight container at room temperature for 2-3 days. Trust me, it’s so good, it might not even last that long!
Frequently Asked Questions
Can I substitute the buttermilk in this recipe?
Yes, if you don’t have buttermilk, you can substitute it with regular milk. Just add a tablespoon of vinegar or lemon juice to make it a bit more tangy, which will still give you that delicious richness!
How can I make this cake ahead of time?
Feel free to bake the cake layers a day ahead and store them in an airtight container. Frosting can be made in advance too—just keep it in the fridge, and bring it to room temperature before frosting the cake.
Why This Cake is Worth Making
At the end of the day, this Double Chocolate Banana Layer Cake is all about indulgence in the best way possible. It’s the kind of cake that brings joy to every bite—rich chocolate, naturally sweet bananas, and a frosting so smooth and creamy, you’ll have to fight the urge to eat it with a spoon (I won’t judge if you do). Whether you’re feeding a crowd or treating yourself (no shame in that!), this cake is your ticket to dessert bliss.
So next time you’re craving something sweet, make this cake. It’s easy, it’s fun, and it’s absolutely delicious.
If you love indulgent cakes, be sure to check out more dessert ideas like my Moist Lemon Pound Cake or Simple Cinnamon Rolls.