It’s October, which means it’s officially spooky season, and what better way to celebrate than with a batch of decadent Spiderweb Brownies? These brownies are not only rich and fudgy but also incredibly easy to make, thanks to a clever shortcut: a brownie mix!
These brownies are so simple, yet the result is impressive. They’re perfect for Halloween parties, classroom treats, or a cozy night in with family. Just follow these simple instructions, and you’ll have delicious Spiderweb Brownies ready in no time. Let’s get started!
Why You’ll Love It
These Spiderweb Brownies are a Halloween hit for a reason! The fudgy brownie base, combined with the sweet, gooey marshmallow web, is a truly delightful combination. Kids and adults alike will adore these spooky treats. They’re quick to make, which is great for busy families, and the decorative spiderweb design is super easy to achieve, even if you’re not a baking expert. Plus, who can resist a brownie that looks as fun as it tastes?
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Spiderweb Brownies
- Total Time: 50 mins
- Yield: 16 brownies
Description
Indulge in the spooky season with these decadent Spiderweb Brownies. Made with a simple brownie mix shortcut, these treats are easy to create yet incredibly impressive. Perfect for Halloween parties or a cozy night in.
Ingredients
- 1 brownie mix (plus ingredients called for on the box)
- 1/2 cup mini marshmallows
- 2 tablespoons spider sprinkles
- Cooking spray or parchment paper
Instructions
- Preheat oven to 350°F (175°C). Grease an 8×8 inch baking pan or line with parchment paper.
- Prepare brownie mix according to package directions.
- Pour batter into the prepared pan, bake as directed, and cool completely.
- Melt marshmallows in 30-second intervals until smooth. Let cool slightly, then stretch into thin strands and drape over brownies.
- Sprinkle with spider sprinkles.
Notes
Ensure the brownies cool completely before adding the marshmallow webs to prevent melting. For a cleaner web design, briefly freeze the cooled brownies. High-quality sprinkles will enhance the visual appeal.
- Prep Time: 20 mins
- Cook Time: 30 mins
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredient Overview

Here’s what you’ll need to make these creepy-crawly treats:
- 1 brownie mix (plus ingredients called for on the box)
- 1/2 cup mini marshmallows
- 2 tablespoons spider sprinkles
- Cooking spray or parchment paper
Step-by-Step Instructions
Step 1: Prep the Oven and Pan
Preheat your oven to 350°F (175°C). Lightly grease an 8×8 inch baking pan with cooking spray or line it with parchment paper, leaving an overhang on the sides to make lifting the brownies out easier later. This will prevent sticking and ensure clean removal.
Step 2: Mix the Brownie Batter
Prepare the brownie mix according to the package directions. Be sure not to overmix the batter.
Step 3: Bake the Brownies
Pour the brownie batter into your prepared pan and spread evenly. Bake for the time recommended on the brownie mix box, or until a toothpick inserted into the center comes out with just a few moist crumbs attached. Don’t overbake! Let the brownies cool completely in the pan before moving on to the next step. This is super important for creating those perfect spiderwebs.
Step 4: Create the Spiderwebs
Place the marshmallows in a microwave-safe bowl and microwave in 30-second intervals, stirring after each, until melted and smooth. Let the melted marshmallows cool slightly, until they become tacky and begin to thicken. Carefully pick up small amounts of the marshmallow between your fingers and gently stretch it out to create thin strands, resembling spiderwebs. Drape these marshmallow webs over the cooled brownies, pressing lightly to adhere them to the surface.
Step 5: Add the Final Touch
Sprinkle the spider sprinkles over the marshmallow webs for an extra spooky touch. Now your Spiderweb Brownies are ready to be devoured!
Pro Tips

- For extra fudgy brownies, try underbaking them by a minute or two. See our guide on how to make perfect brownies.
- If your marshmallows are too hot, let them cool for a few more minutes before stretching. If they become too stiff to stretch easily, reheat them briefly in the microwave.
- Use good-quality sprinkles – the colors will be more vibrant and add to the overall look of your brownies.
- For a cleaner look, place your cooled brownies in the freezer for about 30 minutes before adding the marshmallow webs. This will help prevent the marshmallows from melting into the brownies and create a more distinct web design.
Recipe Variations
- White Chocolate Spiderwebs: Use white chocolate melts instead of marshmallows for a different flavor and color. Melt the white chocolate according to package instructions and drizzle it over the brownies in a spiderweb pattern.
- Nutty Spiderwebs: Add chopped nuts, like pecans or walnuts, to the brownie batter before baking for added crunch and flavor. You can also sprinkle some chopped nuts over the marshmallow webs.
- Spiderweb Blondies: For a butterscotch twist, use a blondie mix instead of a brownie mix. The contrast of the light blondie with the white spiderwebs is beautiful! Need inspiration? Check out our amazing blondie recipe.
Can I use regular-sized marshmallows instead of mini marshmallows?
Yes, you can use regular-sized marshmallows, but you’ll need to cut them into smaller pieces before melting to ensure they melt evenly and quickly.
How long do these brownies last?
These brownies are best enjoyed fresh, but you can store them in an airtight container at room temperature for up to 3 days.
Can I make these brownies ahead of time?
Yes, you can bake the brownies a day or two ahead of time and store them in an airtight container. Add the marshmallow webs and sprinkles just before serving.
My marshmallow webs aren’t stretching well. What am I doing wrong?
The marshmallows might be too hot or too cold. Let them cool slightly after melting until they’re tacky. If they’re too stiff, reheat them in the microwave for a few seconds.
Serving Suggestions

These spooky Spiderweb Brownies are perfect for any Halloween gathering. Serve them warm with a scoop of vanilla ice cream or a dollop of whipped cream for an extra special treat. They’re also delicious on their own, accompanied by a glass of cold milk. For other party ideas, check out our Halloween treats collection.
Final Thoughts
These Spiderweb Brownies are easy, fun, and incredibly delicious, making them the perfect Halloween treat. They’re also a fantastic way to get kids involved in the kitchen and enjoy some quality time together. So, grab your ingredients, put on your favorite Halloween playlist, and get ready to bake up some spooky fun! If you love this recipe, we’d love it if you’d share it with your friends! Visit us on Facebook, Pinterest, and Instagram for more delicious recipes and baking inspiration! Check out our about us section for more Korean recipe ideas.