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Side view of the Dark Chocolate Mount Doom Cake showing exceptionally dark moist layers and heavy ganache drips.

Dark Chocolate Mount Doom Cake: The Ultimate Triple-Layer Ebony Masterpiece

An intense, towering three-layer dark chocolate cake featuring Dutch-processed cocoa for a deep ebony hue. Topped with a craggy mountain-like peak of glossy ganache, slow-moving drips, and a garnish of flaky sea salt and chocolate shavings.
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Prep Time 45 minutes
Cook Time 35 minutes
Total Time 1 hour 20 minutes
Servings: 12 slices
Course: Desserts
Cuisine: American
Calories: 580
Ingredients Equipment Method Notes

Ingredients
  

Ebony Chocolate Sponge
  • 3 cups (375g) All-purpose flour
  • 3 cups (600g) Granulated sugar
  • 1.5 cups (180g) Dutch-processed cocoa powder Extra dark preferred
  • 1 tbsp (15g) Baking soda
  • 1.5 tsp (8g) Baking powder
  • 1.5 tsp (9g) Salt
  • 3 large Eggs Room temperature
  • 1.5 cups (360ml) Buttermilk Room temperature
  • 1.5 cups (360ml) Hot coffee or boiling water To bloom cocoa
  • 0.75 cup (180ml) Vegetable oil
  • 1 tbsp (15ml) Vanilla extract
Glossy Ganache & Garnish
  • 24 oz (680g) Dark chocolate 60-70% cacao, chopped
  • 2 cups (480ml) Heavy cream
  • 1 pinch Flaky sea salt For garnish
  • 2 tbsp Dark chocolate shavings For garnish

Equipment

  • 3 8-inch round cake pans Greased and lined with parchment.
  • 1 Off-set Spatula For creating ganache peaks.
  • 1 Kitchen Scale For precise gram measurements.

Method
 

Bake the Layers
  1. Sift together flour, sugar, cocoa, baking soda, baking powder, and salt in a large bowl.
  2. Add eggs, buttermilk, oil, and vanilla. Beat on medium for 2 minutes. Stir in hot coffee/water by hand until smooth.
  3. Divide batter into three 8-inch pans. Bake at 350°F (175°C) for 30-35 minutes until a toothpick comes out with moist crumbs.
Ganache and Assembly
  1. Pour simmering heavy cream over chopped chocolate. Let sit for 5 minutes, then whisk until glossy and ebony.
  2. Layer cakes with ganache. Pour remaining ganache over the top, allowing it to drip slowly down the sides.
  3. Use an off-set spatula to create craggy peaks on top. Garnish with flaky sea salt and dark chocolate shavings.

Notes

Use Dutch-processed cocoa for the darkest color.
Ensure the ganache is around 85°F (29°C) for the perfect slow-moving drip.