
Chocolate Marble Banana Bundt Cake: A Perfect Fusion of Flavors

This chocolate marble banana Bundt cake is everything you love about banana cake – moist, buttery, and full of that incredible banana flavor – but with an added twist: a rich, fudge-like chocolate ganache swirl running through every slice. If you love banana bread and chocolate together, this cake will win you over!
Reader Reviews:
- Nancy says: “Yum! First time trying this, and I can see why it has all 5-star reviews. Next time I’ll add nuts for a little bite. ★★★★★”
- Casey adds: “Absolutely loved this recipe. The cake is lovely and moist, and the ganache takes it to another level. Can’t wait to make it again. ★★★★★”
Why You’ll Love This Chocolate Marble Banana Bundt Cake

This cake stands out in so many ways:
- Flavor: It all starts with 1 and 1/2 cups of mashed bananas, giving the cake a deep banana flavor. Along with brown sugar, cinnamon, and vanilla, the cake is packed with flavor, while the chocolate ganache adds that irresistible richness.
- Texture: Bundt cakes are always a bit denser than sheet cakes, but this one is perfectly balanced. It’s moist and soft like banana bread but with that extra fluffiness that makes it a true cake.
- Ease of Preparation: There are two main components – the cake batter and the ganache. The most important tip is timing. Let the ganache cool for about 30 minutes before swirling it into the batter so it’s the right consistency. If you make the ganache first, it will be ready by the time your cake batter is mixed and the oven is preheated!
How to Make the Perfect Chocolate Ganache Swirl
Here’s the secret to the beautiful marble effect: real chocolate ganache! It’s super easy to make – you only need two ingredients: chocolate and heavy cream.
Tips for the Perfect Ganache:
- Use Baker’s or Ghirardelli semi-sweet chocolate bars (found in the baking aisle).
- Let the ganache cool for about 30 minutes until it thickens to a gravy-like consistency. This is crucial – if it’s too thin, the batter will absorb it too much. If it’s too thick, it will prevent the batter from cooking evenly.
Perfecting the Banana Cake Batter

For this banana cake, we start with a base banana cake recipe and make a few tweaks:
- Baking Powder: We added just a touch more to give the cake better lift.
- Reduced Buttermilk: This helps prevent the cake from being too wet with the ganache. The result is a perfectly moist yet non-soggy cake.
Layering and Swirling the Ganache

Once the ganache is ready and your batter is prepared, it’s time to get swirling! Here’s how you do it:
- Layer the cake batter into the Bundt pan, and then swirl in the ganache. You want to make sure the ganache is evenly distributed, so that each bite has a bit of chocolate goodness.
- Bake at 325°F (163°C) until it’s perfectly golden brown and a toothpick comes out clean.
Finishing Touches: Topping with Extra Ganache

To take this cake to the next level, make extra ganache for the topping. The recipe gives you the perfect amount to save half for after the cake bakes and cools. When it’s time to drizzle, just reheat the ganache so it’s thin enough to pour over the cake.
If you’re feeling adventurous, you can switch up the topping. Salted caramel would pair beautifully, or you can try the chocolate peanut butter topping from my chocolate chip loaf cake – readers absolutely loved that one!
FAQ:
Q: How do I make sure the ganache doesn’t ruin the cake?
A: The trick is letting the ganache cool down to a gravy-like consistency before swirling it into the batter. This ensures it doesn’t turn the batter too runny or overly thick. Make sure to let it rest for about 30 minutes before using it!
Q: Can I use a regular cake pan instead of a Bundt pan?
A: Yes! You can use a regular round cake pan if you prefer, though the cake may bake a little differently. Just be mindful of the bake time and check the cake with a toothpick before taking it out of the oven.
Q: Can I add nuts to this cake?
A: Absolutely! Adding chopped walnuts or pecans would give this cake an extra crunch. A few readers have suggested it, and I think it would be a delicious addition.
Q: Can I freeze the cake?
A: Yes, this cake freezes really well! After baking and cooling, wrap the cake tightly in plastic wrap and store it in the freezer for up to 3 months. Thaw it out before serving, and it will taste just as fresh.
Q: What can I serve with this cake?
A: This cake is amazing on its own, but if you want to dress it up, you can serve it with whipped cream, fresh berries, or even a drizzle of chocolate syrup. The options are endless!
Conclusion:
This chocolate marble banana Bundt cake is the perfect blend of moist, buttery banana cake and rich chocolate ganache. It’s easy to make, especially with the tips on creating the perfect ganache, and will surely impress anyone who gets a slice. Whether you’re celebrating a special occasion or just craving something delicious, this cake will always hit the spot!