Name: Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe
Prep time: 15 min
Cook time: 25 min
Total time: 55 min
Cuisine: American
Ingredients: 1 cup plus 1 tbsp (150g) all-purpose flour; ⅓ cup (28g) cocoa powder (preferably Dutch cocoa); ½ teaspoon baking powder; ½ teaspoon baking soda; ¾ cup (150g) granulated sugar; ¼ teaspoon salt; 1 large egg; ¼ cup (60ml) oil (canola, olive, sunflower or vegetable oil); ⅓ cup (80ml) whole milk; 1 teaspoon (5ml) pure vanilla extract; ½ cup (120ml) hot coffee; 5 oz (142g) marshmallows (about 3 cups mini or 24 large); 3 tablespoon (42g) unsalted butter; 1 cup (237ml) 35% heavy whipping cream; 5 oz (142g) semisweet dark chocolate (preferably couverture chocolate chips); ⅓ cup plus 1 tbsp (95ml) 35% heavy whipping cream, cold from the fridge; 1 tsp (7ml) honey or corn syrup

Print Recipe· 4.4 from 3 reviews

If you’ve ever dreamed of recreating that nostalgic treat from your childhood, this Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe is your golden ticket. Picture a moist, rich chocolate cake layered with luscious homemade marshmallow cream and finished with a glossy, decadent chocolate ganache. Every bite is a dreamy harmony of textures and flavors that feels both luxurious and incredibly comforting. Whether it’s for a festive occasion or just because you deserve a sweet escape, this recipe transforms humble ingredients into a stunning dessert that’s sure to impress friends and family alike.

Ingredients You’ll Need

A flat lay of baking ingredients is shown on a white marbled surface, arranged neatly in clear glass bowls and cups. There are four main layers of ingredients grouped closely: from top left, a bowl full of white mini marshmallows, next to it a bowl piled with white flour, and beside that a bowl with dark brown cocoa powder. On the next layer down, a bowl of white sugar sits center-left, with a single white egg to its right and a small bowl of light yellow oil nearby. Below these, a white cup filled with black coffee is to the left of a bowl holding three chunks of pale yellow butter, while to the right there's a bowl of white milk. At the bottom row, a small bowl with white baking soda and powder is next to a bowl of shiny dark chocolate chunks, with a small bowl of golden vanilla extract nearby, and a pitcher of white cream lined up to the left. The whole setup looks orderly and bright with natural light. Photo taken with an iphone --ar 4:5 --v 7

The magic of this Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe lies in its simple but thoughtfully chosen ingredients. Each one plays a crucial role—from the tender crumb of the chocolate cake to the fluffy marshmallow filling and the silky chocolate ganache finish.

All-purpose flour (1 cup plus 1 tbsp / 150g): Provides the perfect structure and lightness for the cake.
Dutch cocoa powder (⅓ cup / 28g): Delivers a deep, rich chocolate flavor with a smooth finish.
Baking powder (½ teaspoon) and baking soda (½ teaspoon): These leavening agents ensure your cake rises beautifully.
Granulated sugar (¾ cup / 150g): Adds the just-right sweetness that balances the cocoa’s bitterness.
Salt (¼ teaspoon): Enhances all the flavors, especially chocolate.
Large egg (1): Binds ingredients and adds richness.
Oil (¼ cup / 60ml): Keeps the cake moist and tender—canola, olive, sunflower, or vegetable oil works brilliantly.
Whole milk (⅓ cup / 80ml): Adds creaminess and helps with the cake’s texture.
Pure vanilla extract (1 teaspoon / 5ml): Infuses a lovely warm aroma that complements the chocolate.
Hot coffee (½ cup / 120ml): Intensifies the chocolate flavor without overpowering sweetness.
Marshmallows (5 oz / 142g): The star ingredient for the luscious marshmallow cream filling—mini or large both work.
Unsalted butter (3 tablespoons / 42g): Adds richness and smooths the marshmallow mix.
Heavy whipping cream (1 cup / 237ml plus ⅓ cup + 1 tbsp / 95ml cold): Whipped cream creates fluffy layers and silky ganache.
Semisweet dark chocolate (5 oz / 142g): For an indulgent, glossy ganache topping.
Honey or corn syrup (1 tsp / 7ml): Adds shine and smoothness to the ganache.

How to Make Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe

Step 1: Prepare Your Pan and Preheat the Oven

Begin by preheating your oven to 325°F. Line an 8×8-inch square metal baking pan with parchment paper, making sure to leave about a 2-inch overhang on both sides—this will make lifting out the cake so much easier after baking. For extra security, you can use binder clips to keep the parchment in place. This small prep step saves you from frustrating sticking issues later.

Step 2: Mix the Dry Ingredients

Sift together the all-purpose flour, Dutch cocoa powder, baking powder, and baking soda into a medium-sized bowl. Then whisk in the sugar and salt until everything is well combined. This uniform mix ensures the cake will rise evenly and have a consistent chocolate flavor throughout.

Step 3: Combine Wet Ingredients with Dry

Make a well in the center of your dry ingredients and add the oil, beaten egg, milk, and vanilla extract. Slowly whisk this into the dry ingredients until combined, though the batter will look a bit dry at first. Now comes the secret twist—gradually whisk in the hot coffee, which thins the batter and deepens the chocolate taste, producing a tender, moist crumb.

Step 4: Bake the Cake

Pour your smooth batter evenly into the prepared pan, using a spatula to level it out. Bake for 20-25 minutes or until a toothpick inserted in the middle comes out clean. Once baked, transfer the cake to a wire rack and let it cool completely right in the pan. If needed, level the top gently with a knife to make room for your filling, but this cake usually bakes wonderfully flat on its own.

Step 5: Make the Marshmallow Cream Filling

While the cake cools, it’s time to whip up the dreamy marshmallow cream. Place marshmallows in a microwave-safe bowl and pour melted butter over them. Heat in the microwave at medium power for 2-3 minutes, stirring every 30 seconds to help them melt smoothly. Be cautious not to overheat or burn the sugars. Stir vigorously to achieve a flowing, smooth marshmallow blend, then let it sit for 5-10 minutes until it cools close to room temperature—just enough so it won’t melt the whipped cream in the next stage.

Step 6: Whip the Cream and Fold into Marshmallow

Pour cold heavy cream into a mixing bowl and beat with an electric mixer until stiff peaks form. Gently mix about half of this whipped cream into the cooled marshmallow mixture using a hand mixer to lighten the texture. Then, fold in the remaining whipped cream by hand in three additions to keep it fluffy and airy. Pop this filling into the fridge to chill for at least 15 minutes.

Step 7: Assemble the Cake Layers

Use a serrated knife to carefully slice the cooled cake in half horizontally, producing two even layers. Spread all but 3 tablespoons of the chilled marshmallow cream filling over the bottom layer with an offset spatula. Place the second layer of cake on top, then refrigerate while you prepare the ganache topping. This layering is what truly recreates that signature Hostess treat experience.

Step 8: Make the Chocolate Ganache

Chop the dark chocolate and place it in a heatproof bowl. Warm the remaining cream and honey (or corn syrup) until boiling and pour it over the chocolate. Cover and let it sit for 2 minutes. Then whisk gently until the ganache turns smooth and glossy—this luscious topping will give your cake that beautiful professional finish.

Step 9: Top the Cake with Ganache

Remove the cake from the fridge and quickly pour the ganache over the surface, using a spatula to spread it out evenly and let it drip down the sides slightly. Work briskly because the ganache will start to set on the chilled cake. The rich, shiny coating adds a jaw-dropping visual finish and decadent flavor contrast.

Step 10: Pipe the Marshmallow Cream Decoration

Fill a piping bag fitted with a small round tip or simply cut the tip off a zip-top bag with the reserved marshmallow cream. Pipe three rows of looping strings across the top as a playful homage to the classic Hostess design. Now you’re ready to slice into slices of nostalgia and joy!

How to Serve Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe

A rectangular chocolate cake is shown with two thick layers; the top and bottom layers are dark brown with a slightly crumbly texture and a faint shiny glaze. Between these layers is a thick middle layer of fluffy white cream filling that looks soft and smooth, slightly bulging out at the edges. The cake rests on a black cooling rack placed on a white marbled surface, with natural light highlighting the textures and colors. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

For an extra-special touch, try sprinkling a few mini chocolate chips, edible glitter, or crushed roasted nuts around the edges. A dusting of powdered sugar adds a bit of snowy charm, and a fresh strawberry or two makes for a pop of color and brightness that balances the sweetness.

Side Dishes

This cake pairs beautifully with a simple cup of black coffee or a luscious vanilla bean ice cream for an indulgent dessert pairing. If you’re serving for brunch, fresh fruit like raspberries or sliced bananas complements the rich chocolate and marshmallow flavors wonderfully.

Creative Ways to Present

Why not turn this Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe into bite-sized squares for a party platter? You can also layer cupcakes following the same steps for a fun individual treat, or experiment by drizzling caramel sauce over the ganache to add a new flavor twist.

Make Ahead and Storage

Storing Leftovers

Wrap any leftovers tightly in plastic wrap and store in the refrigerator. It retains its moist texture and flavors best and should be eaten within 3-4 days for optimal freshness.

Freezing

You can freeze the whole cake before adding the ganache or freeze individual slices wrapped in foil and plastic for up to 2 months. Thaw overnight in the fridge before serving and add fresh ganache or whipped cream for the best experience.

Reheating

This cake is best enjoyed cold or at room temperature. If you prefer a slightly warmed slice, microwave it for about 10 seconds, but avoid heating too long or the marshmallow cream will soften too much.

FAQs

Can I use regular cocoa powder instead of Dutch cocoa in this recipe?

Yes, you can, but Dutch cocoa tends to have a smoother, less acidic flavor, which enhances the overall taste. Regular cocoa powder will work just fine but might produce a slightly different chocolate depth.

What if my marshmallows don’t melt smoothly?

If your marshmallows are clumping or not melting properly, try heating them in shorter intervals and stirring frequently. You can also add a tablespoon of water or butter to help soften them. Patience and gentle heat are key.

Can I substitute the coffee with something else?

Definitely! Hot water works as a neutral alternative, but coffee boosts the chocolate flavor wonderfully. Decaf or flavored coffee can also be used depending on your preference.

What’s the best way to slice the cake without messing up the ganache?

Use a sharp serrated knife and wipe the blade clean between each cut. Letting the ganache chill fully before slicing helps it hold its shape beautifully.

Is there a dairy-free way to make this Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe?

You can substitute dairy milk and cream with coconut milk or other plant-based alternatives that whip well. Use a dairy-free chocolate and check the ingredients for marshmallows as some may contain gelatin, but vegan options exist.

Final Thoughts

Making this Hostess Cake with Marshmallow Cream and Chocolate Ganache Recipe is like opening a delicious little time capsule from your childhood—each bite brings joy and rich comfort. It’s a treat that’s as fun to make as it is to eat, and perfect for sharing with loved ones. So gather your ingredients, roll up your sleeves, and enjoy every sweet moment of this delightful homemade treasure.