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Best Black Velvet Spider Web Chocolate Cake Recipe Easy Mirror Glaze Tutorial

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A rich, dark black velvet chocolate cake with a glossy mirror glaze and a delicate spider web design, perfect for impressing guests with minimal stress.

Ingredients

  • All-purpose flour – 1 ¾ cups (220g)
  • Black cocoa powder – ¾ cup (75g) (I recommend Hershey’s Special Dark for best color and flavor)
  • Baking powder – 1 ½ teaspoons
  • Baking soda – ½ teaspoon
  • Salt – ½ teaspoon
  • Unsalted butter – ¾ cup (170g), softened
  • Granulated sugar – 1 ¼ cups (250g)
  • Large eggs – 2, room temperature
  • Buttermilk – 1 cup (240ml), room temperature (You can substitute with 1 cup milk + 1 tablespoon lemon juice, let sit 5 min)
  • Vanilla extract – 2 teaspoons
  • Hot water – ¾ cup (180ml)
  • Granulated sugar – 1 cup (200g) (for mirror glaze)
  • Sweetened condensed milk – ½ cup (120ml) (for mirror glaze)
  • Water – ½ cup (120ml) (for mirror glaze)
  • Gelatin powder – 2 tablespoons (about 14g), bloomed in ¼ cup cold water (for mirror glaze)
  • Black food coloring gel – 1 teaspoon (optional, depending on cocoa darkness)
  • White chocolate – ½ cup (90g), chopped (for spider web design)
  • Heavy cream – ½ cup (120ml) (for mirror glaze)

Instructions

  1. Preheat your oven to 350°F (175°C). Grease and line two 9-inch round cake pans with parchment paper.
  2. Sift together dry ingredients: all-purpose flour, black cocoa powder, baking powder, baking soda, and salt.
  3. Cream butter and sugar using an electric mixer until light and fluffy, about 3-4 minutes.
  4. Beat in eggs one at a time, fully incorporating each before adding the next. Stir in vanilla extract.
  5. Alternate adding dry ingredients and buttermilk, beginning and ending with dry mixture. Mix on low speed.
  6. Stir in hot water carefully until just combined; batter will be thin.
  7. Divide batter evenly into prepared pans and tap lightly to remove air bubbles.
  8. Bake for 30-35 minutes. Check doneness with a toothpick; it should come out clean or with a few moist crumbs.
  9. Cool cakes in pans for 10 minutes, then transfer to wire racks to cool completely.
  10. Prepare mirror glaze: In a small saucepan, combine sugar, sweetened condensed milk, and water. Heat over medium, stirring until sugar dissolves.
  11. Remove from heat; add bloomed gelatin and stir until melted.
  12. Pour hot mixture over chopped black or dark chocolate and cream. Let sit 2 minutes, then whisk smooth. Add black gel food coloring if needed.
  13. Cool glaze to about 90°F (32°C), pourable but not too runny.
  14. Place one cake layer on a cooling rack over a tray. Pour glaze evenly over the top, letting it drip down the sides. Repeat with second layer or stack after glaze sets slightly.
  15. Create spider web design: Melt white chocolate with a splash of cream until smooth. Transfer to piping bag or zip-top bag with a tiny corner cut.
  16. Pipe concentric circles on glaze, then drag a toothpick from center outward to form web pattern.
  17. Refrigerate cake for at least 1 hour to set glaze fully before slicing.

Notes

Use black cocoa powder for deep color and flavor. Bloom gelatin fully before adding to glaze. Pour glaze at about 90°F for best coverage. Work quickly when piping spider web design. For dairy-free glaze, substitute coconut cream and plant-based condensed milk. Store leftovers covered in fridge up to 4 days; freeze up to 2 months.

Nutrition

Keywords: black velvet cake, chocolate cake, mirror glaze, spider web design, black cocoa powder, Halloween cake, easy chocolate cake, showstopper dessert

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