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Perfect Spider Web Brownie Pan Recipe Easy Royal Icing Design Tutorial

spider web brownie pan recipe - featured image

A fudgy brownie base decorated with a simple yet spooky spider web design made from royal icing. Perfect for Halloween or any fun occasion, this recipe combines rich chocolate flavor with a crisp, sweet icing decoration.

Ingredients

Scale
  • 1/2 cup (113g) unsalted butter, melted
  • 1 cup (200g) granulated sugar
  • 2 large eggs, room temperature
  • 1 tsp vanilla extract
  • 3/4 cup (95g) all-purpose flour, sifted
  • 1/3 cup (35g) unsweetened cocoa powder, sifted
  • 1/4 tsp salt
  • 1/4 tsp baking powder
  • 1 cup (120g) powdered sugar, sifted
  • 1 large egg white (or 2 tbsp meringue powder + 2 tbsp water)
  • 1/2 tsp fresh lemon juice
  • 1/4 tsp vanilla extract (optional)
  • A few drops black gel food coloring

Instructions

  1. Preheat oven to 350°F (175°C). Line an 8×8 inch pan with parchment paper, leaving overhang for easy lifting.
  2. Melt the butter until fully liquid but not hot, about 30 seconds. Set aside to cool slightly.
  3. In a medium bowl, whisk together sugar and eggs until slightly thickened and pale, about 2 minutes with an electric mixer or 3-4 minutes by hand.
  4. Stir in vanilla extract and melted butter slowly, combining fully.
  5. In a separate bowl, sift together flour, cocoa powder, salt, and baking powder.
  6. Gradually add the dry ingredients to the wet mixture, folding gently with a spatula until just combined.
  7. Pour the batter into the prepared pan and smooth the top with a spatula.
  8. Bake for 25 to 30 minutes or until a toothpick inserted near the center comes out with a few moist crumbs.
  9. Remove from oven and let cool completely in the pan on a wire rack, about 1 hour.
  10. While brownies cool, prepare the royal icing: beat the egg white (or meringue powder mixture) until frothy.
  11. Gradually add powdered sugar, lemon juice, and vanilla, beating until thick and glossy, about 5-7 minutes.
  12. Divide the icing: reserve about 3/4 cup plain white icing and tint the rest with black gel food coloring.
  13. Spread the white icing evenly over the cooled brownie surface using an offset spatula or butter knife.
  14. Fill a piping bag with black icing and pipe concentric circles starting from the center of the brownie pan outward.
  15. Use a toothpick or skewer to drag lines outward from the center through the circles, creating the spider web pattern.
  16. Let the icing dry completely at room temperature for at least 2 hours before slicing.

Notes

If royal icing is too runny, add more powdered sugar to thicken. If too stiff, add a few drops of water. Decorate only when brownies are fully cool to prevent melting the icing. Let icing dry fully for best results. For vegan or gluten-free adaptations, substitute eggs with flax eggs and use gluten-free flour blend; use aquafaba-based royal icing for vegan option.

Nutrition

Keywords: brownies, spider web design, royal icing, Halloween dessert, chocolate brownies, easy brownie recipe, festive brownies