Spooktacular Peanut Butter Spider Cookies That’ll Crawl Right Off the Plate

Peanut Butter Spider Cookies: Creepy-Cute Halloween Cookies

Eight legs, two Whoppers, and absolutely no reason to call pest control.

These Peanut Butter Spider Cookies turn a simple 3-ingredient peanut butter cookie into a creepy-cute Halloween treat with chocolate frosting, malted milk balls, and candy eyes. They’re soft and chewy in the middle, lightly crisp around the edges, and just imperfect enough to look delightfully homemade.

What makes these spider cookies especially fun is the chocolate-filled center. Each cookie gets a little “bowl” pressed into the dough before baking. Once cooled, that center is filled with chocolate frosting, topped with two Whoppers for the spider body, piped with eight legs, and finished with candy eyes.

They’re easy enough to make with kids, fun enough for a Halloween party, and guaranteed to crawl off the dessert table faster than you can say, “Who invited the spiders?”

Why These Spider Cookies Are a Must-Bake

• Just three pantry staples for the cookie base: Peanut butter, sugar, and an egg. No flour and no mixer required.
• Chocolate does double duty: Frosting fills the cookie center, helps hold the Whoppers in place, and becomes the spider legs.
• Kid-friendly and fun to decorate: Crooked legs and wonky candy eyes only make them better.
• Perfect for Halloween: Serve them at parties, bake sales, classroom celebrations, monster-themed birthdays, or family movie night.
• Easy to customize: Change the chocolate, candy body, eyes, or decorations to create your own spider invasion.
• Love spooky sweets? Try Monster Cookie Pops or Halloween Eyeball Cake.

Watch How to Make Peanut Butter Spider Cookies

See how these easy Peanut Butter Spider Cookies go from a simple three-ingredient dough to creepy-cute Halloween spiders. Watch how to flatten the cookies, create the chocolate-filled centers, add the Whopper bodies, and pipe those delightfully wonky spider legs.

Ingredient Overview: What Makes These Cookies Crawl with Flavor

• Peanut Butter: Smooth, conventional creamy peanut butter gives the most predictable texture in this flourless dough. Natural peanut butter with separated oil can make the dough softer and affect spreading. I like using creamy peanut butter for consistent results.
• Granulated Sugar: Adds sweetness and structure, helping create chewy centers and lightly crisp edges.
• Egg: Binds the simple three-ingredient dough together.
• Chocolate Frosting: A rich and creamy chocolate frosting fills the cookie bowl and creates the spider legs.
• Whoppers: Two Whoppers or malted milk balls form each spider’s head and abdomen.
• Candy Eyes: Two eyes make an adorably goofy spider, although eight is fair game if you want to lean into the arachnid theme.

Ingredients List

For the Peanut Butter Cookies:

• 1 cup (250 grams) smooth peanut butter
• 1 cup (200 grams) granulated sugar
• 1 large egg

For the Spider Decoration:

• 2 malted milk balls (Whoppers) per cookie
• 2 candy eyes per cookie, or more for extra creep factor
• 1 tub Rich & Creamy Chocolate Frosting

Helpful Equipment

You don’t need special Halloween baking gear, but a few basic tools make these easier to shape and decorate.

• Cookie scoop for quick, even dough portions
• Kitchen scale if you want approximately 34-gram portions
• Large glass mixing bowls
• Rimmed cookie sheets with cooling racks
• Parchment paper
• Flat-bottomed drinking glass
• Rounded tablespoon
• Small piping bag or resealable bag

Step-by-Step Instructions

Preheat the Oven

Set the oven to 350°F (177°C) and line two baking sheets with parchment paper.

Make the Dough

Combine peanut butter, sugar, and egg in a mixing bowl. Stir until a soft dough forms.

If the dough feels very soft, sticky, or oily, refrigerate it for about 10 minutes before shaping. The dough should be soft but firm enough to roll into balls.

Shape the Cookies

Use a cookie scoop or kitchen scale to portion the dough into approximately 34-gram balls.

Arrange the dough balls on the prepared baking sheets, leaving room between them to spread slightly.

Flatten the Dough

Gently press each dough ball with the flat bottom of a drinking glass.

You’re looking for a thick disc, not a pancake. A gentle press is enough to create a sturdy base for the spider.

Create the Spider Base

Press a small “bowl” into the center of each cookie using the rounded side of a tablespoon.

Don’t press all the way through the dough. This indentation will hold the chocolate frosting and Whopper spider body after baking.

Bake Until Golden

Bake for 8–10 minutes, beginning to check the cookies at 8 minutes.

Look for edges that are set and lightly golden. The centers may still look slightly soft, which is fine because the cookies continue to firm as they cool.

Cool Completely

Let the cookies settle briefly on the baking sheet, then transfer them carefully to a wire rack to finish setting.

If the center indentation puffed up during baking, gently press the rounded tablespoon back into the center while the cookie is still warm and pliable.

Allow the cookies to cool completely before decorating.

How to Decorate Your Spider Cookies

This is where perfectly respectable peanut butter cookies become creepy crawlers.

• Fill the center: Spoon or pipe chocolate frosting into each cooled cookie bowl.
• Add the Whoppers: Nestle two malted milk balls side-by-side into the chocolate center to form the head and abdomen.
• Pipe eight legs: Use a small piping bag or resealable bag with a tiny corner snipped off. Pipe four legs on each side.
• Add the eyes: Attach candy eyes to the front Whopper with tiny dots of frosting.

Slightly crooked legs and mismatched eyes are part of the charm. Homemade spiders should look like they have personalities.

How Do You Know When Peanut Butter Cookies Are Done?

Start checking the cookies at about 8 minutes. The edges should look set and lightly golden while the centers may still appear a little softer.

Don’t wait for the entire cookie to turn deeply browned. These flourless peanut butter cookies continue to firm as they cool, and overbaking can make them dry and crumbly.

Expert Tips for Spooky Success

• Use smooth conventional peanut butter: It gives this simple flourless dough the most predictable consistency.
• Chill soft dough: Ten minutes is a good starting point. If the dough still won’t hold a ball, chill it a little longer.
• Use a scale for even cookies: Approximately 34 grams per cookie helps them bake at a similar rate.
• Don’t over-flatten: A thick disc holds the center well better than a thin cookie.
• Keep the center shallow: You only need enough room to hold the frosting and Whoppers.
• Watch the edges: Lightly golden edges are a better doneness cue than the clock alone.
• Add ½ teaspoon honey for a shinier finish: This is optional and slightly changes the dough, so use it only if you prefer that finish.
• Cool before decorating: Warm cookies can soften the frosting and send your spider bodies sliding.
• Keep the piping opening tiny: Thin chocolate lines make much cleaner spider legs.

Spider Cookie Troubleshooting

Why Did My Cookies Spread?

The dough may have been too warm or your peanut butter may contain more oil. Chill very soft dough before baking and use a smooth conventional peanut butter for the most predictable results.

Why Did the Center Well Disappear?

The dough can puff slightly while it bakes. While the cookie is still warm, gently press the rounded side of a tablespoon back into the center to redefine the indentation.

Why Are My Cookies Cracking?

A few cracks around the edges are normal with flourless peanut butter cookies and actually add to their homemade look.

If the cookie splits badly when you create the well, you may be pressing too deeply. Make a shallow indentation rather than pushing the spoon toward the baking sheet.

Why Are My Spider Legs Running Together?

The opening in your piping bag is probably too large. Snip off the tiniest corner you can and pipe outward from the body.

Why Are the Whoppers Sliding Around?

Nestle the malted milk balls gently into the chocolate frosting. The frosting acts as edible glue and helps keep both pieces in place.

Why Won’t the Candy Eyes Stay On?

Use a tiny dab of chocolate frosting on the back of each candy eye before attaching it to the front Whopper.

Variations and Creative Twists

• Salted Caramel Spiders: Fill the center with a little caramel and add chocolate spider legs.
• White Chocolate Webs: Drizzle thin lines of melted white chocolate around the spider for a cobweb effect.
• Mini Spider Army: Make bite-sized cookies and use smaller chocolate candies for the bodies. Begin checking them earlier because smaller cookies may bake more quickly.
• Extra-Eyed Spiders: Use four, six, or eight candy eyes if two simply aren’t creepy enough.

What Can I Use Instead of Whoppers?

Another similarly sized round chocolate candy can work in place of malted milk balls. Choose something firm enough to hold its shape and small enough that two pieces can sit together in the chocolate center.

Whoppers are still my first choice because the two round candies create a recognizable spider head and abdomen.

Serving Suggestions for Maximum Spook

• Serve the finished spider cookies on a dark Halloween platter with a few cookie crumbs for a graveyard effect.
• Add them to a Halloween dessert board with candy, popcorn, and other spooky treats.
• Serve them at classroom parties, Halloween bake sales, monster-themed birthdays, or family movie night.
• Pair them with Ooey-Gooey Brownie S’mores or hot cocoa for a cozy Halloween spread.

Make-Ahead Tips

If you’re making these for a Halloween party, bake the peanut butter cookies ahead and decorate them closer to serving time.

Let the cookies cool completely before storing them. Keeping them undecorated also protects the Whoppers, candy eyes, and piped legs from getting bumped or crushed.

How to Store Peanut Butter Spider Cookies

Keep finished spider cookies in an airtight container at room temperature for up to 3 days or refrigerate them for up to 1 week.

If you need to stack decorated cookies, place parchment between the layers so the chocolate legs, Whoppers, and eyes don’t get damaged.

FAQs About Spider Cookies

Can I Use Natural Peanut Butter?

You can, but the texture may be oilier and the dough may behave differently. Smooth commercial peanut butter gives the most consistent results in this flourless recipe.

Can I Use Crunchy Peanut Butter?

You can experiment with it, but smooth peanut butter works better. Crunchy peanut butter changes the texture and makes it harder to form an even center well.

Do I Have to Chill the Dough?

Not necessarily. If the dough rolls easily and holds its shape, you can continue with the recipe. If it feels very soft, sticky, or oily, chill it for about 10 minutes or until easier to handle.

Can I Freeze the Dough?

Yes. Freeze portioned dough balls in an airtight container for up to 2 months. Thaw them in the refrigerator, then flatten and create the center well before baking.

Can I Make the Dough Ahead?

Yes. Prepare the dough ahead and keep it covered in the refrigerator until you’re ready to shape and bake. Very cold dough may need a few minutes at room temperature before rolling.

Can I Make Spider Cookies Without Candy Eyes?

Yes. Use small dots of white decorating icing or white chocolate for the eyes and add tiny dark chocolate dots for the pupils.

Can I Pipe the Legs Without a Piping Bag?

Yes. Spoon the chocolate frosting into a small resealable bag and snip off a very tiny corner.

Do I Add the Whoppers Before or After the Spider Legs?

Add the Whoppers first. Nestle the two malted milk balls into the chocolate-filled center, then pipe four legs on each side. This keeps the spider body positioned correctly and gives you a clear starting point for the legs.

How Many Legs Should Each Spider Cookie Have?

Eight — four on each side. Fortunately, Halloween spiders don’t care if one comes out a little crooked.

More Fun Favorite Recipes and Ideas

• Monster Cookie Pops: The Sweetest Scare of the Season
• Halloween Eyeball Cake – Devil’s Food Layers with Neon Frosting & Candy Eyes
• Ooey-Gooey Brownie S’mores: Campfire Flavor Without the Bug Spray
• DIY Ghost Mirror Craft Inspired by Are You Afraid of the Dark?
• The At-Home DIY Pumpkin Scrub Your Skin Will Love

Final Thoughts

These Peanut Butter Spider Cookies prove Halloween baking doesn’t have to be complicated to be wickedly good. The three-ingredient cookie keeps the baking simple, while the chocolate-filled center, two-Whopper body, crooked chocolate legs, and goofy candy eyes bring all the Halloween personality.

Make them tidy if that’s your thing. Give them lopsided eyes and wildly uneven legs if it isn’t. Either way, these may be the only spiders your Halloween guests willingly reach for.