Spider Web Brownies

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These Halloween inspired Spider Web Brownies are the easiest and cutest way to make some Halloween brownies without all the fuss.

Overhead shot of a board with brownies decorated with spider webs surrounded by spiders. — Spider Web Brownies

Drawing spider webs on chocolate brownies couldn't be easier. That's why I like these brownies, they're super easy, almost effort-less treats you can make for your child's class or an office party or something like that.

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❤️ Why you'll love it
🧅 Ingredients
🥣 Instructions
🔄 Substitutions and Variations
🔌 Equipment
📘 More Halloween Recipes
🧊 Storage
💡 Tips
👩‍🍳 FAQs
Spider Web Brownies
💬 Comments

❤️ Why you'll love it

Using a box brownie mix really speeds things up - plus they're not that bad. If you prefer though, you can make the brownies from scratch.
If you're not much of an artist (like me) then drawing a spiral on top of a brownie isn't too difficult and they look super cute. It's a simple frosting decoration.
These spider web brownies are perfect for a Halloween Party or a get together.

🧅 Ingredients

Box Brownie Mix (I prefer the Ghirardelli brand)
Egg
Water
Vegetable Oil
Butter
Powdered Sugar
Vanilla Extract
Heavy Cream
Salt

See recipe card at the bottom of this post for quantities.

🥣 Instructions

collage of four images showing how to make spider web brownies.

Step 1: In a medium bowl prepare the brownie mix per the package instructions.
Step 2: Pour mixture and bake in a square pan in the preheated oven for about 25 minutes.
Step 3: Remove the baked brownie and allow to cool completely on a cooling rack, then cut into 9 even squares with a table knife.
Step 4: Mix the icing ingredients in a large bowl with a hand mixer at medium speed. (Add more cream if you need the icing wetter or add more powdered sugar if it's too wet.)
Step 5: Pipe a spiral pattern of icing on top of each brownie then using a toothpick scratch a line from the center of each spiral outward, do this about 5 times.

Hint: You'll want to have your toothpick ready. Don't wait as the icing will dry quickly then you don't get the same effect as the toothpick will just cut through the icing instead of dragging it with it.

🔄 Substitutions and Variations

Homemade brownies - if you have a favorite brownie recipe and prefer to make them from scratch you can do so.
Semi sweet chocolate chips - add a handful of semisweet chocolate chips to the brownie batter.
Store-bought Frosting - you can buy the little pouches of icing at the store to decorate the spider web design. I'm not sure how hard it will set though.
Cream Cheese Frosting - you could make a cream cheese frosting.
White chocolate Frosting - you could use this too.

Side view of a board with brownies surrounded by spiders.

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🔌 Equipment

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I used a 9x9" square baking tin to bake my brownies. You could use an 8x8 if you like your brownies a little taller.

You'll need a hand mixer and some mixing bowls too. As well as a piping bag with a small tip (Wilton #1).

I have some affiliate links in the recipe card below.

📘 More Halloween Recipes

You could also check out this list of Kid Friendly Halloween Recipes.

🧊 Storage

Once the brownies have been prepared store in an airtight container at room temperature for up to 1 week.

They do freeze well, but I recommend freezing the brownie itself before you ice it, then add the icing on the day you wish to present them.

💡 Tips

Expert Tip: Do not overbeat the brownie batter or you will incorporate air which will make it rise more, but then it will sink in the middle after and you'll have an uneven brownie square with high sides.

If you don't have a piping bag at home you could use a resealable disposable bag (zip-lok type plastic sandwich bag) and put the icing in there, then snip the corner of the bag. It will work just as well as a piping bag.

A spider web brownie with a bite taken out of it.

👩‍🍳 FAQs

How can I stop the brownies from sticking?

Make sure to grease the brownie tin well with cooking spray before you add the brownie batter. I actually like to add parchment paper, which helps in lifting out the brownies too.

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Spider Web Brownies

Yield: 9

Prep Time: 5 minutes

Cook Time: 25 minutes

Cooling Time: 30 minutes

Total Time: 1 hour

These Halloween spide web brownies are super cute and easy to make. Deliciously soft and chewy brownies decorated with a sweet icing piped on in the shape of a spider web.

Ingredients

1 (17.8oz) Box Brownie Mix
1 Large Egg
¼ Cup Water
⅓ Cup Vegetable Oil
½ Cup Butter, room temperature
3-½ Cups Powdered Sugar
1 Teaspoon Vanilla Extract
½ Teaspoon Salt
2-3 Tablespoons Heavy Cream

Instructions

Preheat your oven to 325°F.
Prepare the brownie mix per the packaging instructions.
Bake 25-30 minutes.
Remove from the oven and allow to cool completely.
Cut the brownies into 9 equal size squares.
In a large mixing bowl add the stick of butter and beat until creamy.
Add powdered sugar, a cup at a time until incorporated.
Add the vanilla, salt and heavy cream and continue to mix until the consistency is right for adding to a piping bag and piping onto the brownies.
Add to a piping bag with your smallest piping tip (Wilton #1 if you have it). Make sure your icing is thin enough to pipe through it.
Starting in the center of each brownie pipe a spiral circle until the whole brownie has been filled then take a toothpick and draw a line from the center of the piped spiral to the edge. Repeat this a few times until you have a spider web formed.