Here is a warm and simple cake that mixes banana flavor with rich chocolate in a pretty swirl.
introduction
This Chocolate Marble Banana Bundt Cake brings together ripe bananas and chocolate ganache in a moist, easy-to-make cake. The cake bakes in a 10-inch Bundt pan and gets a pretty marble pattern from a chocolate swirl. The top is finished with a smooth ganache drizzle for more chocolate flavor. If you like banana and chocolate treats, you may also enjoy the similar, easy muffin recipe for banana chocolate chip streusel muffins for another quick morning or snack option.
Why You’ll Love This Chocolate Marble Banana Bundt Cake
You will love this cake because it is moist, full of banana flavor, and has a rich chocolate swirl. The batter is simple to make and mixes in one bowl with a mixer. The ganache adds a glossy chocolate finish that looks and tastes special. It is large and hearty, perfect for family gatherings or a special treat. The marble pattern looks fancy but is easy to do, so you get a beautiful cake without extra effort.
Why Make This Recipe
Make this recipe when you have ripe bananas that need using. It turns overripe bananas into a soft textured cake. The cake stores well and tastes great warmed for a few seconds in the microwave. It works for brunch, dessert, or a coffee break. The ganache keeps the cake rich and gives clean slices when cooled. This recipe is forgiving — small changes in ripeness and mixing still give good results.
What You Need for Chocolate Marble Banana Bundt Cake
You need a 10-inch Bundt pan, a stand mixer or handheld mixer with paddle attachment, a medium heat-proof bowl for ganache, a small saucepan to warm cream, measuring cups and spoons, a spatula, and a knife or toothpick to swirl the batter. A wire rack for cooling is helpful. It is best to have room temperature eggs and butter for smoother mixing. Heavy nonstick spray helps the cake release from the pan after baking.
How to Make Chocolate Marble Banana Bundt Cake
Follow these steps in order for the best result. Start with the ganache so part of it has time to thicken, then make the batter and swirl.
Prepare the ganache: Place chopped chocolate in a medium heat-proof bowl. Heat the cream in a small saucepan over medium heat until it begins to gently simmer. Do not let it come to a rapid boil. Pour the hot cream over the chopped chocolate. Let it sit for 2–3 minutes so the chocolate softens. Slowly stir until the chocolate melts and the mixture is smooth. The finer the chocolate is chopped, the faster it will melt. You should have about 1 and 1/2 cups of ganache.
Set aside half for the swirl: Leave about 3/4 cup (180 ml) at room temperature uncovered until it thickens to a gravy-like texture, about 30 minutes. This is the swirl ganache used inside the cake. Cover and refrigerate the rest to use as the topping later. You can refrigerate the topping ganache up to 5 days before using.
Preheat oven and prepare pan: Preheat your oven to 350°F (177°C). Generously grease a 10-inch Bundt pan with a heavy coating of nonstick spray. A good coating helps the cake release cleanly.
Mash the bananas: Mash the bananas until mostly smooth with just a few small lumps. You can use your mixer for this. Set the mashed bananas aside.
Mix dry ingredients: Whisk together the flour, baking powder, baking soda, cinnamon, and salt in a bowl. Set this mix aside.
Cream butter and sugars: Using a mixer fitted with the paddle, beat the softened butter on high until smooth and creamy, about 1 minute. Add the granulated sugar and brown sugar. Beat on high for 2 minutes until they are creamed together. Scrape down the bowl as needed.
Add eggs, vanilla, and bananas: Add the eggs and vanilla. Beat on medium-high until combined. Then beat in the mashed bananas. The mixture may look chunky or slightly curdled; that is normal.
Combine dry and wet ingredients: With the mixer on low, add the dry ingredients in three parts, alternating with the buttermilk. Start and end with dry ingredients. Mix each addition just until incorporated. Do not over-mix. The batter will be thick with some lumps. The recipe makes about 6 cups of batter.
Layer and swirl with the thickened ganache: Pour about one-third of the batter (about 2 cups) into the prepared pan. Drizzle half of the thickened ganache over this layer (about 6 tablespoons). Swirl gently with a knife or toothpick. Add another one-third of the batter, then drizzle the rest of the ganache (about 6 tablespoons). Add the final batter and swirl again. Try not to overdo the swirl to keep the marble look.
Bake: Bake 60–75 minutes or until a toothpick inserted into the cake comes out clean with just a couple lightly moist crumbs. This cake is large and dense, so it may take longer in some ovens. If the top browns too fast, tent it with foil.
Cool and remove from pan: Let the cake cool in the pan for 2 hours. Then invert the slightly cooled cake onto a wire rack or serving plate. Let it cool completely before topping and slicing.
Finish with ganache topping: Warm the reserved topping ganache until pourable. Heat it gently on low on the stove and stir constantly, or microwave in 10-second intervals, stirring each time. Do not overheat. Drizzle the ganache over the cooled cake.
Store: Cover leftover cake tightly. Keep at room temperature for up to 2 days or refrigerate up to 5 days. Reheat slices for a few seconds in the microwave and serve with vanilla ice cream if you like.
Ingredients:
two 4-ounce quality semi-sweet chocolate bars (113g each), finely chopped
1 cup (8 ounces; 240ml) heavy cream or heavy whipping cream
1 and 1/2 cups (345g) mashed bananas (about 4 medium or 3 large ripe bananas)
3 cups (375g) all-purpose flour (spooned & leveled)
1 and 1/2 teaspoons baking powder
1 teaspoon baking soda
1/2 teaspoon ground cinnamon
1/2 teaspoon salt
3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
1 cup (200g) granulated sugar
1/2 cup (100g) packed light or dark brown sugar
3 large eggs, at room temperature
2 teaspoons pure vanilla extract
1 and 1/3 cups (320ml) buttermilk, at room temperature*
Directions:
This cake is swirled and topped with chocolate ganache. If you aren’t topping the cake with ganache, halve the ganache recipe so you’re only making what you need for the swirl. (Use one 4 ounce chocolate bar and 1/2 cup (120ml) heavy cream.)
Place chopped chocolate in a medium heat-proof bowl. Heat the cream in a small saucepan over medium heat until it begins to gently simmer. (Do not let it come to a rapid boil– that’s too hot!) Pour over chocolate, then let it sit for 2-3 minutes to gently soften the chocolate. Very slowly stir until completely combined and chocolate has melted. The finer you chopped the chocolate, the quicker it will melt with the cream. You should have about 1 and 1/2 cups of ganache. Set half aside (3/4 cup or 180ml) at room temperature uncovered until it has thickened into a gravy-like consistency, about 30 minutes. Use this in step 7. Cover and refrigerate the rest of the ganache to use as the topping in step 10. Ganache topping can be refrigerated for up to 5 days before using.
Preheat the oven to 350°F (177°C) and generously grease a 10-inch Bundt pan. To guarantee the Bundt cake releases seamlessly, I strongly recommend using a heavy coating of nonstick spray.
Mash the bananas until there’s hardly any lumps. I usually just use my mixer for this! Set mashed bananas aside.
Whisk the flour, baking powder, baking soda, cinnamon, and salt together. Set aside.
Using a handheld or stand mixer fitted with a paddle attachment, beat the butter on high speed until smooth and creamy, about 1 minute. Add both sugars and beat on high speed for 2 minutes until creamed together. Scrape down the sides and up the bottom of the bowl with a silicone spatula as needed. Add the eggs and the vanilla. Beat on medium-high speed until combined, then beat in the mashed bananas. Mixture will be chunky and appear curdled—that’s ok. Scrape down the sides and up the bottom of the bowl as needed. With the mixer on low speed, add the dry ingredients in three additions alternating with the buttermilk and mixing each addition just until incorporated. Do not over-mix. The batter will be thick with some lumps. Makes about 6 cups of batter.
You will use the slightly thickened ganache reserved for the swirl in this step. Pour about 1/3 of the cake batter (about 2 cups) evenly into prepared pan. Drizzle half of the ganache on top (about 6 Tablespoons). Swirl with a knife or toothpick. Evenly pour another 1/3 of the cake batter on top, followed by the rest of the ganache (about 6 Tablespoons), then the rest of the cake batter. Swirl everything together with a knife or toothpick.
Bake for 60-75 minutes or until a toothpick inserted into the cake comes out clean with just a couple lightly moist crumbs. This is a large, heavy cake so don’t be alarmed if it takes a little longer in your oven. If the cake is browning quickly in the oven, tent it with aluminum foil to help it bake more evenly.
Once done, remove from the oven and allow to cool for 2 hours inside the pan. Then, invert the slightly cooled cake onto a wire rack or serving dish. Cool completely before topping, slicing, and serving.
The ganache topping will be very thick by now. Warm it over low heat on the stove stirring constantly until thinned and drizzle-able consistency. Do not over-heat it. Or warm in 10 second increments in the microwave, stirring after each until thinned. Drizzle over cake, then slice and serve.
Cover leftover cake tightly and store at room temperature for up to 2 days or in the refrigerator for up to 5 days. Cake tastes unbelievable warmed in the microwave for a few seconds and served with vanilla ice cream.
Best Ways to Serve Chocolate Marble Banana Bundt Cake
Serve slices at room temperature or slightly warmed. For a simple dessert, add a scoop of vanilla ice cream or a dollop of whipped cream. A dusting of powdered sugar gives a light finish. For a richer plate, serve with extra warm ganache on the side or fresh berries to cut the sweetness. This cake also fits well at breakfast with a cup of coffee. Cut medium-thick slices so the marble pattern shows.
How to Store Chocolate Marble Banana Bundt Cake
Wrap the cooled cake tightly in plastic wrap or place in an airtight container. Keep at room temperature for up to 2 days. For longer storage, refrigerate for up to 5 days. If you refrigerate the cake, let slices come to room temperature or warm them gently before serving to return the soft texture. You can also freeze slices wrapped tightly for up to 3 months; thaw overnight in the fridge and warm before serving.
Easy Tips to Make Chocolate Marble Banana Bundt Cake
- Use very ripe bananas for the best banana flavor.
- Chop chocolate finely for smoother ganache.
- Let the swirl ganache thicken to a gravy texture before using so the swirl holds.
- Don’t over-mix the batter after adding flour to avoid a dense cake.
- Grease the Bundt pan well for easy release. Use a heavy nonstick spray.
- If the cake browns too fast, tent with foil to avoid over-browning while the center finishes baking.
Try These Variations of Chocolate Marble Banana Bundt Cake
- Add chopped nuts like walnuts or pecans to the batter for crunch.
- Swap semi-sweet for dark chocolate if you prefer stronger chocolate taste.
- Stir in chocolate chips for extra chocolate pockets.
- Replace cinnamon with a little nutmeg or cardamom for a different spice note.
- Use yogurt instead of buttermilk if that is what you have on hand (slightly change texture).
Common Questions About Chocolate Marble Banana Bundt Cake
Q: Can I make this cake in a loaf pan instead of a Bundt pan?
A: Yes. Baking time will change. Check the cake after 45–55 minutes and use a toothpick to test doneness. A loaf will bake faster because it is smaller in volume.
Q: How ripe should the bananas be?
A: Very ripe is best. Brown speckled skins mean sweeter bananas and better banana flavor in the cake. Overripe bananas mash easily and add moisture.
Q: Can I skip the ganache swirl and topping?
A: Yes. You can skip or halve the ganache if you only want a slight swirl. If you skip the topping, the cake still tastes great and holds well.
Q: Can I make the ganache ahead of time?
A: Yes. The topping ganache can be refrigerated up to 5 days. Warm gently before using. The swirl ganache should be at room temperature and slightly thickened when you layer the batter.
Q: Why did my cake sink in the middle?
A: Common causes are under-baking, opening the oven too early, or too much leavening. Make sure the center reaches the proper doneness and avoid opening the oven in the first 40–50 minutes.
Final Thoughts
This Chocolate Marble Banana Bundt Cake is a simple way to use ripe bananas and get a special dessert. It looks nice, slices cleanly, and stays moist. The marble swirl and ganache make it feel like a treat without hard work.
Ready to Give It a Try?
Gather your ripe bananas and chocolate, follow the steps, and enjoy a rich, banana-scented cake with a chocolate twist. Share it warm with family or save slices for later — it still tastes great the next day.
Print
Chocolate Marble Banana Bundt Cake
- Total Time: 105 minutes
- Yield: 12 servings 1x
- Diet: Vegetarian
Description
A moist cake combining ripe bananas and rich chocolate in a beautiful marble pattern, finished with a smooth chocolate ganache drizzle.
Ingredients
- 2 (4-ounce) quality semi-sweet chocolate bars, finely chopped
- 1 cup heavy cream
- 1 and 1/2 cups mashed bananas (about 4 medium or 3 large ripe bananas)
- 3 cups all-purpose flour
- 1 and 1/2 teaspoons baking powder
- 1 teaspoon baking soda
- 1/2 teaspoon ground cinnamon
- 1/2 teaspoon salt
- 3/4 cup unsalted butter, softened
- 1 cup granulated sugar
- 1/2 cup light or dark brown sugar
- 3 large eggs, at room temperature
- 2 teaspoons pure vanilla extract
- 1 and 1/3 cups buttermilk, at room temperature
Instructions
- Prepare the ganache: Place chopped chocolate in a medium heat-proof bowl. Heat the cream in a small saucepan over medium heat until it simmers. Pour the hot cream over the chocolate and let sit for 2-3 minutes, then stir until smooth.
- Set aside half for the swirl: Leave 3/4 cup of ganache at room temperature until thickened, cover and refrigerate the rest for topping.
- Preheat oven to 350°F (177°C). Grease a 10-inch Bundt pan generously with nonstick spray.
- Mash the bananas until mostly smooth and set aside.
- Mix dry ingredients: Whisk flour, baking powder, baking soda, cinnamon, and salt in a bowl.
- Cream butter and sugars until smooth. Add eggs and vanilla, then beat in bananas. The mixture may look chunky.
- Combine dry and wet ingredients in three parts, alternating with buttermilk, mixing just until incorporated.
- Layer and swirl: Pour one-third of the batter into the pan, drizzle half of the thickened ganache, swirl gently. Repeat layers, finishing with batter on top.
- Bake for 60-75 minutes or until a toothpick comes out clean. If browning too quickly, tent with foil.
- Cool in the pan for 2 hours, then invert onto a wire rack to cool completely.
- Warm the reserved ganache and drizzle over the cooled cake before serving.
Notes
This cake is delicious served warm with vanilla ice cream. Cover leftovers tightly and can be stored at room temperature for up to 2 days or in the refrigerator for up to 5 days.
- Prep Time: 30 minutes
- Cook Time: 75 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 350
- Sugar: 22g
- Sodium: 300mg
- Fat: 16g
- Saturated Fat: 9g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 46g
- Fiber: 2g
- Protein: 5g
- Cholesterol: 45mg