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White Chocolate Spiderweb Brownies for Halloween
Lily

White Chocolate Spiderweb Brownies for Halloween

These spooky White Chocolate Spiderweb Brownies are the ultimate Halloween flex — fudgy, rich brownies topped with silky white chocolate ganache and an easy yet dramatic spiderweb design. Foolproof, crowd-pleasing, and perfect for parties.
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Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Servings: 16 brownies
Course: Dessert
Cuisine: American, Halloween
Calories: 270
Ingredients Equipment Method Notes

Ingredients
  

  • 1 box fudge brownie mix (plus required oil, eggs, and water)
  • 12 oz high-quality white chocolate chips
  • ½ cup heavy cream
  • ¼ cup black cocoa or 2 tbsp black food coloring gel
  • 1 optional: squeeze bottle or piping bag

Equipment

  • 8x8 or 9x9 baking dish
  • mixing bowls
  • heatproof bowl
  • saucepan
  • spatula
  • piping bag or squeeze bottle
  • toothpick

Method
 

  1. Bake brownies according to package directions. Let them cool completely before decorating.
  2. Heat heavy cream until just simmering and pour it over white chocolate chips in a heatproof bowl. Let sit 1 minute, then whisk until smooth to make ganache.
  3. Pour ganache over cooled brownies and spread evenly with a spatula.
  4. In a small bowl, mix black cocoa or food gel with a few teaspoons of ganache until you get a thick, pipeable black paste.
  5. Transfer black ganache to piping bag or squeeze bottle. Pipe 4–5 concentric circles on top of the white ganache.
  6. Use a toothpick to drag lines from the center outward, creating a spiderweb effect. Let set completely before slicing.

Notes

Let the brownies cool completely before adding ganache. For best results, use high-quality white chocolate. To make vegan, use dairy-free chocolate, coconut cream, and a vegan brownie mix. Make ahead and refrigerate or freeze. You can also create little spiders using black icing instead of a full web!