These Halloween-inspired Spider Web Brownies are an easy and adorable way to make festive brownies with minimal effort.
Drawing spider webs on chocolate brownies is simple and quick. These treats are perfect for a school class, office party, or any Halloween gathering.
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What makes this recipe so yummy
- Using a boxed brownie mix speeds up the process while still delivering great flavor; you can also use a homemade brownie recipe if you prefer.
- The spider web decoration is forgiving—pipe a simple spiral of frosting and drag a toothpick outward a few times to create a web even if you’re not an artist.
- They’re a fun, crowd-pleasing dessert for Halloween parties and get-togethers.
Groceries you’ll need: Ingredients
- Box brownie mix (I like Ghirardelli)
- Large egg
- Water
- Vegetable oil
- Unsalted butter (room temperature)
- Powdered sugar
- Vanilla extract
- Heavy whipping cream
- Salt
See the recipe card below for exact quantities.
Recipe walkthrough: Instructions
This is a quick overview. Refer to the recipe card below for precise details.
- Step 1: Prepare the boxed brownie mix according to package directions.
- Step 2: Pour the batter into a square pan and bake in a preheated oven for about 25 minutes.
- Step 3: Cool the baked brownies completely on a rack, then cut into 9 even squares.
- Step 4: Make the frosting: beat butter until creamy, add powdered sugar a cup at a time, then add vanilla, salt, and heavy cream until it reaches a pipeable consistency.
- Step 5: Pipe a spiral of icing on each brownie. With a toothpick, drag lines from the center outward several times to form a spider web.
Hint: Keep a toothpick ready and work before the icing sets. Dragging the toothpick while the icing is still soft creates clean web lines.
Recipe variations and substitute ideas
- Make brownies from scratch if you prefer a homemade base.
- Add semisweet chocolate chips to the batter for extra chocolate pockets.
- Store-bought icing pouches can be used to decorate if you want a shortcut; results may vary.
- Cream cheese or white chocolate frosting are tasty alternatives to the butter-based icing.
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Necessary gear: Equipment
You’ll need a square baking pan (9×9″ or 8×8″ for thicker brownies), mixing bowls, a hand mixer, and a piping bag with a small tip (Wilton #1 recommended).
More Halloween recipes I think you’ll love
- Halloween Chocolate Covered Strawberries
- Ghost Cupcakes
- Zombie Cupcakes
- Halloween Jungle Juice
- Halloween Grilled Cheese
- Monster Meatloaf
- Halloween Cookies with Sprinkles
- Breadstick Rattlers
- Mummy Oreos
- Nutter Butter Ghosts
You can also explore more kid-friendly Halloween recipes on the site.
How to store leftovers
Store finished brownies in an airtight container at room temperature for up to one week.
They freeze well; freeze plain brownies and add the icing after thawing for best results.
Mel’s kitchen notes
Avoid overbeating the brownie batter; too much air will make it rise and then sink in the center. If you don’t have a piping bag, use a resealable plastic bag and snip a tiny corner to pipe the icing.
Frequently asked questions: FAQs
Grease the pan well with cooking spray and line it with parchment paper to make removing the brownies easy.
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Spider Web Brownies
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Equipment
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Glass mixing bowls
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Hand mixer
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Piping bags and tips (small tip)
Ingredients
- 1 (17.8 Ounce) Box Brownie Mix
- 1 Each Large Egg
- ¼ Cup Water
- ⅓ Cup Vegetable Oil
- ½ Cup Unsalted Butter room temperature
- 3-½ Cups Powdered Sugar
- 1 teaspoon Vanilla Extract
- ½ teaspoon Salt
- 3 Tablespoons Heavy Whipping Cream
Instructions
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Preheat oven to 325°F.
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Prepare the brownie mix according to package directions using the box mix, egg, water, and oil.
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Bake 25–30 minutes, then remove and cool completely.
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Cut cooled brownies into 9 equal squares.
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Make the icing: beat ½ cup unsalted butter until creamy.
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Add 3½ cups powdered sugar a cup at a time until combined.
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Stir in 1 teaspoon vanilla, ½ teaspoon salt, and 3 tablespoons heavy cream. Mix until the icing is pipeable.
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Transfer icing to a piping bag fitted with a small tip. Thin the icing slightly if it won’t pass through the tip.
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Pipe a spiral from the center to the edge on each brownie. Drag a toothpick from the center outward several times to form a spider web.
Nutrition
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Have you ever tried a sizzling brownie? It’s a fun dessert variation worth checking out.