Chocolate Marshmallow Cake {Heart Cake} is a celebration on a plate! Whether you’re marking a special occasion or simply craving something sweet, this cake is sure to enchant everyone around. Picture a moist, rich chocolate cake layered with creamy strawberry buttercream frosting, accented by playful mini pink marshmallows. It’s not just a treat for the taste buds; visually, it steals the show with its heart shape and delightful decorations.
Thank you for reading this post, don't forget to subscribe!Imagine the delight on your loved ones’ faces as you present this stunning dessert, crafted with love and a bit of creativity. With an easy-to-follow recipe, even those who may not consider themselves bakers can confidently whip this up. So, let’s roll up our sleeves and get started on creating this gorgeous Chocolate Marshmallow Cake {Heart Cake}!
Why This Recipe Works
This Chocolate Marshmallow Cake, shaped as a heart, is a delightful combination of soft, moist chocolate cake and luscious strawberry buttercream frosting. The mini pink marshmallows add a playful texture, making it irresistible for any celebration. The recipe is straightforward, ensuring that even novice bakers can create a stunning dessert that looks gourmet without the fuss.
Why You’ll Love This Chocolate Marshmallow Cake
This heart-shaped cake is not just visually appealing; it’s a treat for the taste buds too. The rich chocolate flavor pairs perfectly with the sweet strawberry frosting, creating a harmonious blend. Perfect for Valentine’s Day or any special occasion, this cake is sure to impress your loved ones and leave them craving more.

Ingredients
- For the Chocolate Cake:
-
1 chocolate cake mix (plus ingredients as directed)
-
For the Frosting and Decoration:
- 2 cups strawberry buttercream frosting
- 1 cup mini pink marshmallows
- ¼ cup heart sprinkles
Preparing the Chocolate Cake

Preparing the Cake in a Rectangle Pan
Start by preparing your chocolate cake mix as per package instructions. Pour the batter into a 9×11 inch rectangle pan. Bake it until a toothpick inserted in the center comes out clean. This step is crucial, so keep an eye on the timer!
Cooling the Cake
Once baked, remove the cake from the oven. Allow it to cool completely in the pan on a wire rack. This cooling step is essential for easy removal and decoration later on.
Shaping the Heart Cake
Cutting Out Heart Shapes
After the cake is cooled, it’s time to have some fun! Use a heart-shaped cutter to cut out pieces from your prepared chocolate cake. Aim for a few heart shapes to create layers.
Assembling the Heart Cake
Layering with Frosting and Marshmallows
On a small serving plate, place one heart cake piece. Generously spread strawberry frosting on top, then stick a layer of mini pink marshmallows into the frosting. Each layer should bring a smile!
Stacking the Layers
Take another heart cake piece and place it atop the marshmallows. Repeat the frosting and marshmallow layering process to create that delightful, fluffy structure. The more layers, the better!
Decorating the Heart Cake
Adding Final Touches
Complete your cake by frosting the top layer smoothly and sprinkling additional mini pink marshmallows. Finally, shower the cake with heart sprinkles for that extra festive flair. Your creation is now ready to shine!
Tips for Success
- Cooling Matters: Make sure the chocolate cake is completely cooled to prevent the frosting from melting.
- Cutting Shape: Use a sharp heart cutter for clean edges.
- Get Creative: Feel free to customize the decoration with themed sprinkles or even edible glitter to add a personal touch.
Variations
- Gluten-Free Option: Substitute with gluten-free chocolate cake mix for those with dietary needs.
- Frosting Flavors: Experiment with vanilla or raspberry frosting for different flavor profiles. It can be fun to switch things up!
Serving Suggestions
This Chocolate Marshmallow Cake is perfect for sharing at birthday parties, weddings, or even just as a sweet treat during a cozy evening at home. Pair it with a scoop of vanilla ice cream or a dollop of whipped cream for added indulgence. Trust me; the combination is heavenly!
Storage Tips
Store any leftovers in an airtight container in the refrigerator for up to three days. Allow the cake to come to room temperature before serving to enjoy its full flavor and texture.

FAQs
What is the best way to cut the heart cake?
Use a sharp knife or a fine serrated knife for clean slices, especially when you get to the marshmallows.
Can I use a homemade chocolate cake recipe instead of a cake mix?
Absolutely! A homemade chocolate cake can add even more flavor and depth to your dessert.
How do I make the frosting if I don’t have strawberry frosting?
You can easily make strawberry buttercream by mixing butter, powdered sugar, and pureed strawberries until you reach the desired consistency.
Can this cake be frozen?
Yes, the heart cake can be frozen. Wrap it in plastic wrap and aluminum foil to prevent freezer burn when you store it.
What occasions is this cake suitable for?
This cake is perfect for Valentine’s Day, anniversaries, birthdays, or any celebration that calls for a sweet touch!
Creating this Chocolate Marshmallow Cake {Heart Cake} could be one of your most rewarding baking experiences. The combination of rich chocolate and sweet strawberry will not only satiate your sweet tooth but also bring smiles to those you share it with. As you experiment with flavors and decorations, this cake will become a cherished recipe in your baking repertoire. Enjoy every slice and the joyful moments that come with it!
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Chocolate Marshmallow Cake
This heart-shaped cake combines rich chocolate and sweet strawberry buttercream, making it an irresistible treat for any special occasion or sweet craving.
- Total Time: 45 minutes
- Yield: 10 servings 1x
Ingredients
- 1 chocolate cake mix (plus ingredients as directed)
- 2 cups strawberry buttercream frosting
- 1 cup mini pink marshmallows
- ¼ cup heart sprinkles
Instructions
- Prepare chocolate cake mix as directed and bake in a 9×11 inch pan.
- Cool the cake in the pan on a wire rack.
- Use a heart-shaped cutter to cut out several pieces from the cooled cake.
- Layer a heart cake piece on a serving plate, spread with strawberry frosting, and add mini marshmallows.
- Stack another heart piece on top and repeat the frosting and marshmallow layering.
- Frost the top layer, add mini marshmallows, and sprinkle with heart sprinkles.
Notes
Ensure the cake is completely cooled to avoid melting the frosting.
Use a sharp heart cutter for clean edges.
Customize decoration with themed sprinkles or edible glitter for personal flair.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Calories: 320
- Sugar: 30
- Sodium: 250
- Fat: 15
- Saturated Fat: 6
- Unsaturated Fat: 7
- Trans Fat: 0
- Carbohydrates: 45
- Fiber: 1
- Protein: 3
- Cholesterol: 40






