Chocolate Spider Layer Cake
A soft, airy chocolate cake layered with whipped ganache, wrapped in a gooey marshmallow web, and topped with an edible spider — the ultimate Halloween showstopper.

- Prep time
- 20 min
- Cook time
- 35 min
- Yield
- 10 servings
- Difficulty
- HARD
Ingredients
- 2 cup heavy cream
- 13 oz dark chocolate (chopped)
- 13/4 cup all-purpose flour
- 3/4 cup unsweetened cocoa powder
- 11/2 tsp baking powder
- 11/2 tsp baking soda
- 1 tsp salt
- 2 cup granulated sugar
- 2 large eggs
- 1 cup milk
- 1/2 cup neutral oil (vegetable oil)
- 2 tsp pure vanilla extract
- 1 cup boiling water
- 16 chocolate pocky sticks
- 6 large white marshmallows
- Red and black fondant (for eyes)
- Chocolate sprinkles (for spider hair)
Instructions
- 1
Heat the cream to a boil.
- 2
Pour over the chocolate in three parts, stirring each time until smooth.
- 3
Reserve ¼ cup of ganache for shaping the spider body later.
- 4
Cover the remaining ganache with plastic wrap (touching the surface) and refrigerate for at least 2 hours, until chilled.
- 5
Once chilled, whip using a stand mixer until light, fluffy, and firm.
- 6
Preheat to 350°F (180°C) standard or 320°F (160°C) fan/convection. Lightly grease and line two 7-inch (18 cm) round cake pans with parchment paper.
- 7
In a large bowl, whisk together flour, cocoa powder, baking powder, baking soda, salt, and sugar until well combined.
- 8
Add the eggs, milk, oil, and vanilla, whisking until the batter is smooth and lump-free.
- 9
Slowly pour in the boiling water, whisking until the batter is silky and slightly thin — this makes it extra moist.
- 10
Divide batter evenly between pans and bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
- 11
Let cakes cool in the pans for 10 minutes, then remove and transfer to a wire rack to cool completely before frosting.
- 12
Optional: pour ¼ cup of batter into a small greased mold for the spider body; bake for 40 minutes.
- 13
Once baked, run a knife around the edges and let the cake cool completely before removing from the pan.
- 14
Slice: the large cake horizontally into 2 layers and trim the top if domed.
- 15
Spread whipped ganache between the layers and over the entire cake. Chill to set the ganache.
- 16
Microwave marshmallows for 30 seconds until stretchy.
- 17
Pull strands apart with your fingers or two spoons and wrap them around the cake to form a web.
- 18
Crumble the small baked cake and mix with the reserved ganache.
- 19
Shape into a body and head, then roll in chocolate sprinkles.
- 20
Freeze briefly (10-15 minutes), then place on top of the cake.
- 21
Insert 8 Pocky sticks for legs in an upside down V shape (4 per side).
- 22
Add red and black fondant eyes.
- 23
Keep refrigerated until ready to serve