Chocoflan: The Ultimate ‘Impossible Cake’ Recipe for Unforgettable Celebrations
Get ready to be enchanted by Chocoflan, often hailed as the “Impossible Cake”! This spectacular dessert is a true showstopper, combining a rich, moist chocolate cake with a silky, creamy flan, all crowned with a luscious dulce de leche caramel. It’s perfect for any festive occasion, especially Cinco de Mayo, or whenever you want to impress with minimal effort.
The magic of Chocoflan lies in its unique baking process. You pour the flan mixture over the chocolate cake batter, and as it bakes in a water bath, the layers mysteriously switch places! The denser flan mixture sinks to the bottom, while the lighter cake batter rises to the top. Then, when inverted, you get a beautiful flan layer on top of a chocolate cake, with the caramel sauce flowing down the sides. It’s truly a delight to watch, making it an exciting project for both adults and kids alike.
This award-winning Chocoflan recipe comes from my dear friend Halley, and it’s a favorite among everyone who tries it. Its ease of preparation belies its elegant presentation and complex flavors, making it a must-have in your recipe collection. Prepare for gasps of delight and requests for seconds when you serve this extraordinary dessert!

What is Chocoflan? The Magical ‘Impossible Cake’ Explained
Chocoflan, or “pastel imposible” (impossible cake), is a beloved Mexican dessert that ingeniously combines two classic treats into one incredible confection. It features a dense, moist chocolate cake base, often made from a boxed mix for convenience, topped with a traditional, creamy vanilla flan. The entire dessert is baked in a Bundt pan with a rich caramel topping that later coats the cake when inverted.
The “impossible” aspect refers to the fascinating transformation that occurs during baking. Despite pouring the flan mixture over the cake batter, the layers magically separate and switch positions. This happens due to differences in density. The flan mixture, being denser, sinks below the lighter cake batter, which then bakes on top. After baking and cooling, when the cake is flipped onto a serving platter, the flan layer gracefully rests on top of the chocolate cake, beautifully coated in the caramel sauce. The result is a stunning two-toned cake with contrasting textures and complementary flavors – the deep richness of chocolate perfectly balanced by the sweet, custardy smoothness of flan.
Why Chocoflan is a Must-Try Dessert for Any Occasion
Beyond its captivating appearance and delicious taste, Chocoflan offers several compelling reasons to add it to your baking repertoire. Firstly, it’s incredibly impressive to serve. The layered effect and the rich caramel glaze make it look like it took hours of intricate work, when in reality, the preparation is quite straightforward, especially with a convenient boxed cake mix.
Secondly, Chocoflan is a fantastic crowd-pleaser. The combination of chocolate cake and flan appeals to a wide range of palates, satisfying both chocolate lovers and those who prefer a creamy, caramel-infused dessert. It’s a wonderful choice for family gatherings, potlucks, birthday parties, or cultural celebrations like Cinco de Mayo, where its Mexican roots shine.
Furthermore, this recipe is designed for success. The use of a water bath ensures even baking and prevents the flan from cracking, resulting in a perfectly smooth, silky texture every time. Plus, the chilling time allows the flavors to meld beautifully and the cake to set, making it easy to slice and serve. It’s a dessert that truly delivers on both presentation and flavor, making any celebration feel a little more special and a lot more delicious.

Essential Ingredients for Your Chocoflan Masterpiece
The beauty of Chocoflan lies in its relatively simple ingredient list, which combines pantry staples with a few key items to create a truly luxurious dessert. Here’s a detailed look at what you’ll need and some tips for selection:
For the Rich Chocolate Cake Layer:
- 1 box chocolate cake mix: While you can certainly make a chocolate cake from scratch, a good quality boxed mix streamlines the process significantly without compromising on flavor or texture. Opt for a moist chocolate fudge or devil’s food cake mix for the best results.
- 3 eggs: These bind the cake ingredients and add structure and richness.
- 1 stick melted butter: Using melted butter instead of oil (often called for in boxed mixes) adds a richer, more luxurious flavor to the cake.
- 1 cup milk: Milk makes the cake incredibly moist and tender. Whole milk is recommended for the best flavor and texture, but 2% or even a non-dairy milk alternative can work.
For the Creamy Flan Layer:
- 5 eggs: Eggs are the primary structural component of the flan, giving it its characteristic custardy texture.
- 1 12 oz can evaporated milk: This provides a concentrated milk flavor and creaminess without adding excessive water, which is crucial for the flan’s texture.
- 1 14 oz can sweetened condensed milk: The star of the flan layer, this thick, sweet milk provides both sweetness and a luxurious, dense consistency. Do not substitute this with regular milk or evaporated milk.
For the Irresistible Dulce de Leche Topping:
- 1 12 oz can dulce de leche: This thick, caramelized milk sauce is the traditional topping for Chocoflan. Its rich, buttery caramel flavor is essential. If you can’t find dulce de leche, a high-quality jarred caramel sauce can be used as a substitute, but the flavor might be slightly different.
- 1/4 cup milk: This is used to thin out the dulce de leche slightly, making it easier to drizzle and ensuring it coats the cake beautifully.
The Science Behind the Magic: How Chocoflan Layers Switch
The “impossible” aspect of Chocoflan is not a culinary trick, but rather a fascinating demonstration of physics in the kitchen. When you assemble the cake, you first pour the chocolate cake batter into the Bundt pan, followed by the flan mixture on top. It seems counter-intuitive, but the layers indeed switch places during baking due to differences in density.
The flan mixture, which contains evaporated and sweetened condensed milk, along with eggs, is significantly denser than the lighter, airier chocolate cake batter. As the entire dessert bakes in a water bath, the heat slowly cooks both layers. The flan mixture, being heavier, gradually sinks through the chocolate cake batter to form the bottom layer of the baked cake. Simultaneously, the chocolate cake batter, as it bakes and rises, forms the top layer. This gentle, slow cooking process facilitated by the water bath (bain-marie) allows this magical separation to occur without the layers mixing together.
When the Chocoflan is removed from the oven, cooled, and then inverted onto a serving plate, what appears is a perfect chocolate cake base topped with a smooth, golden flan layer. The original caramel at the bottom of the Bundt pan now coats the flan, dripping down the sides of the cake for an incredibly appealing presentation. This delightful phenomenon makes Chocoflan not just a dessert, but an experience!
Step-by-Step Chocoflan Baking Guide
Creating your Chocoflan masterpiece is a fun and rewarding process. Follow these detailed steps to ensure a flawless and delicious result:

Chocoflan
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Ingredients
Cake Layer
- 1 box chocolate cake mix
- 3 eggs
- 1 stick melted butter
- 1 cup milk
Flan Layer
- 5 eggs
- 1 12 oz can evaporated milk
- 1 14 oz can sweetened condensed milk
Topping Layer
- 1 12 oz can dulce de leche; you will only use about 1/2 of the can (or just use another caramel sauce if you can’t find this one)
- 1/4 cup milk
Instructions
- Prepare your oven and pan: Preheat oven to 350° F (175° C). Generously grease a 10-12 cup Bundt pan with butter or baking spray. Ensuring the pan is well-greased is crucial for easy unmolding later.
- Mix the cake batter: In a large bowl, combine the chocolate cake mix, 3 eggs, melted butter, and 1 cup milk. Whisk until just combined and smooth. Be careful not to overmix, as this can lead to a tough cake. Set aside.
- Prepare the flan mixture: In a blender, combine the 5 eggs, sweetened condensed milk, and evaporated milk. Blend until the mixture is completely smooth and uniform. This should only take about 30-60 seconds.
- Layer the cake: Pour the chocolate cake batter evenly into the bottom of the prepared Bundt pan. Use a spatula to gently spread it, ensuring it covers the bottom evenly.
- Add the flan: Carefully pour the flan mixture from the blender over the chocolate cake batter in the Bundt pan. Pour slowly over the back of a spoon to prevent it from disturbing the cake layer too much.
- Set up the water bath: Cover the Bundt pan tightly with aluminum foil. Place the covered Bundt pan into a larger 9×13 inch glass baking pan or a large roasting pan. Carefully pour hot water into the larger pan, ensuring the water comes up about one inch on all sides of the Bundt pan. This is called a water bath (or bain-marie) and is essential for the flan to bake gently and prevent cracking.
- Bake and cool: Bake for one hour. After one hour, carefully remove the Bundt pan from the oven and the water bath. Remove the foil. Let it cool at room temperature for about an hour. Once cooled slightly, transfer the Bundt pan to the refrigerator for at least 5 hours, or preferably overnight, to allow the flan to fully set and the flavors to meld.
- Prepare the caramel topping: When you are ready to serve, combine about 1/2 can of the dulce de leche with about 1/4 cup of milk in a microwave-safe bowl. Stir together thoroughly. Microwave in increments of 20 seconds, stirring well in between, until the mixture is smooth and pourable.
- Unmold and drizzle: Gently turn the chilled Bundt pan over upside down onto a large serving dish. The cake should release easily. Drizzle the warm, smooth caramel in a zig-zag motion over the cake. This creates a beautiful and fancy presentation!
- Serve and enjoy: Serve Chocoflan cold. Refrigerate any leftovers promptly. Slice, serve, and enjoy the magical taste!
Mastering the Water Bath (Bain-Marie) for Perfect Flan
The water bath, or bain-marie, is a non-negotiable step for baking flan, and by extension, Chocoflan. Its purpose is to create a moist, even heat environment around the cake, which is crucial for the delicate flan layer. Direct heat in an oven can cause the flan to cook too quickly, resulting in a rubbery texture and cracks on the surface. The water bath insulates the flan, allowing it to bake slowly and gently, resulting in a silky-smooth, creamy custard without any blemishes. Ensure the water is hot but not boiling when you add it to the larger pan, and be careful when transferring it to and from the oven.
Cooling and Unmolding Your Chocoflan with Confidence
Patience is a virtue when it comes to Chocoflan, especially during the cooling and chilling phases. Allowing the cake to cool gradually at room temperature prevents thermal shock, which could cause the flan to crack. The subsequent refrigeration for at least 5 hours (or overnight) is essential. This chilling time allows the flan to firm up completely, making it stable enough to be cleanly unmolded. Attempting to unmold too early can lead to the flan breaking or sticking to the pan.
When you’re ready to unmold, a gentle technique is key. Run a thin, flexible knife around the edges of the Bundt pan (if necessary) to loosen any sticky spots, then invert the pan onto your serving plate with a swift, confident motion. The caramel that was at the bottom of the pan will now flow down, coating your beautiful Chocoflan.
Tips for Chocoflan Success Every Time
- Grease Your Bundt Pan Thoroughly: Use a generous amount of butter, shortening, or baking spray. Ensure every nook and cranny is coated to guarantee an easy release.
- Don’t Overmix the Cake Batter: Mix until just combined to keep the cake tender and moist.
- Blend Flan Mixture Until Smooth: Ensure there are no egg streaks for the creamiest flan.
- Pour Gently: When adding the flan mixture over the cake batter, pour it slowly over the back of a spoon to minimize disturbance between the layers.
- Water Bath is Essential: Never skip the water bath. It’s the secret to a perfectly smooth and crack-free flan.
- Proper Cooling is Key: Allow ample time for cooling at room temperature and then significant chilling in the refrigerator. This sets the flan and makes unmolding a breeze.
- Test for Doneness: The Chocoflan is done when a knife inserted into the cake portion comes out clean, and the flan appears set but still has a slight jiggle in the center.
Serving Suggestions and Creative Variations
While Chocoflan is spectacular on its own, you can elevate your presentation and flavor profile with a few simple additions:
- Garnishes: A sprinkle of chopped nuts (pecans or walnuts), fresh berries (raspberries or strawberries), a dollop of whipped cream, or a dusting of cocoa powder can add visual appeal and extra flavor.
- Mexican Chocolate Twist: For an extra layer of flavor, consider adding a pinch of cinnamon and a tiny amount of cayenne pepper to your chocolate cake batter for a Mexican hot chocolate flair.
- Coffee Flan: Infuse your flan mixture with a tablespoon of instant coffee or espresso powder for a delicious mocha-Chocoflan variation.
- Orange Zest: A little orange zest in either the cake or flan layer can brighten the flavors beautifully.
Chocoflan: Perfect for Cinco de Mayo and Beyond
Chocoflan holds a special place in Mexican cuisine and is a fantastic choice for celebrating Cinco de Mayo. Its rich flavors and impressive appearance make it a highlight of any fiesta. However, its universal appeal means it’s equally suitable for birthdays, holiday gatherings, family dinners, or simply as a delightful weekend treat. The combination of familiar flavors with a surprising twist ensures it will be a memorable dessert for any occasion you choose to share it.
Conclusion: Indulge in the Magic of Chocoflan
There’s something truly special about Chocoflan – it’s more than just a dessert; it’s an experience of culinary magic. From the mesmerizing layer switch during baking to the exquisite combination of chocolate, creamy flan, and rich caramel, every bite is a delight. This recipe, perfected by Halley, makes achieving this “impossible” feat wonderfully accessible. So, gather your ingredients, follow these steps, and prepare to amaze your family and friends with this utterly delicious and beautiful Chocoflan. Enjoy the smiles, the oohs and aahs, and the sweet satisfaction of creating a truly unforgettable dessert!
