Description
A decadent yet light chocolate mousse cake with a rich cake base, topped with creamy mousse and spooky Halloween decorations. Perfect for parties, family gatherings, or a festive treat that’s easy to make and fun to decorate.
Ingredients
- 1 cup all-purpose flour
- 1/2 cup unsweetened cocoa powder (Dutch-process preferred)
- 1 cup granulated sugar
- 1/2 teaspoon baking powder
- 1/4 teaspoon baking soda
- 1/4 teaspoon salt
- 2 large eggs, room temperature
- 1/2 cup whole milk
- 1/4 cup vegetable oil (or canola oil)
- 1 teaspoon vanilla extract
- 1/2 cup hot water
- 7 oz bittersweet chocolate, chopped
- 2 cups heavy whipping cream, cold
- 1/4 cup powdered sugar
- 1 teaspoon vanilla extract
- Pinch of salt
- White chocolate chips or candy melts (for spiderwebs)
- Candy eyeballs
- Orange, black, or purple sprinkles
- Optional: gummy worms, mini marshmallows, chocolate sticks
Instructions
- Grease a 9-inch springform pan and line the bottom with parchment paper. (If using a regular cake pan, line the sides as well.)
- Preheat oven to 350°F (175°C). In a large bowl, sift together flour, cocoa powder, sugar, baking powder, baking soda, and salt.
- In another bowl, whisk eggs, milk, oil, and vanilla extract. Pour wet ingredients into dry ingredients and mix gently until just combined.
- Stir in hot water; the batter will be thin.
- Pour batter into prepared pan and bake for 22-25 minutes, until a toothpick inserted comes out with a few moist crumbs. Cool completely in pan.
- Place chopped bittersweet chocolate in a heatproof bowl. Microwave in 30-second bursts, stirring until smooth (or use a double boiler). Let cool to room temperature.
- In a chilled bowl, whip heavy cream, powdered sugar, vanilla, and salt until stiff peaks form.
- Gently fold cooled melted chocolate into whipped cream using a spatula. Fold slowly to keep it airy.
- Spread mousse evenly over cooled cake base in the pan. Smooth with an offset spatula or butter knife. Tap pan gently to level.
- Refrigerate at least 3 hours, or overnight, until mousse is set and cake is firm. (Or freeze for 1 hour, watching for ice crystals.)
- Melt white chocolate chips or candy melts. Scoop into a piping bag or zip-top bag, snip a tiny corner, and pipe spiderwebs across the cake. Add candy eyeballs, sprinkles, or other spooky candies.
- Run a thin knife around the edge before releasing pan. Transfer cake to serving platter. Slice with a hot, dry knife for clean pieces.
Notes
For gluten-free, use a 1:1 gluten-free flour blend. For dairy-free, substitute coconut cream and vegan chocolate. Chill mousse well before slicing for best texture. Practice piping spiderwebs on parchment first. Make cake base a day ahead for easy party prep. Use high-quality chocolate for best flavor. If mousse splits, add a splash of cold cream and gently fold.
- Prep Time: 20 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Cuisine: American
Nutrition
- Serving Size: 1 slice (1/12 of cake)
- Calories: 320
- Sugar: 22
- Sodium: 180
- Fat: 22
- Saturated Fat: 13
- Carbohydrates: 32
- Fiber: 3
- Protein: 4
Keywords: Halloween dessert, chocolate mousse cake, spooky cake, party dessert, kid-friendly, easy Halloween recipe, chocolate cake, mousse, festive, make ahead