DIY : Marshmallow Cobweb Cake

Melted Marshmallow Spiderweb Cake for Halloween  |  by Carrie Sellman for

As seen on the cover of Country Living Magazine, October 2013!

We’ve come to the end of our new cake series,EEEK It’s Halloween Week!  A week full of innovative Halloween cakes, like none we had seen before.  A huge thank you to the the five bakeries who participated in this special week of Halloween inspiration!  Each is immensely talented and created such incredible designs.  I am thrilled to have featured them all!  If you missed any of them, you can find them all HERE.

So now that we’re officially in the Halloween spirit and inspired to bake, here is a super easy DIY for you to try at home.  There’s no piping, no painting and no wrong way to do it!  You just need marshmallows, two hands and some imagination!  It’s a creepy, crawly Marshmallow Cobweb Cake!  And I have a simple tutorial to show you how to do it!

How to Make a Marshmallow Spiderweb Cake for Halloween | Tutorial by Carrie Sellman for

You know how marshmallows get stringy when melted?  Well that makes for a super sticky, super easy spiderweb!

How to Make a Marshmallow Spiderweb Cake for Halloween | Tutorial by Carrie Sellman for

I think this cake would be a fun project, no matter your experience or skill level.  If you’re a medium to advanced baker, this cake will seem super easy and you’ll be finished in no time flat.  Beginners…. your end result will look more challenging than it actually was.  Bonus for you!  And you certainly don’t have to tell anyone how easy it was.  And if you really just don’t bake at all, why not try out the marshmallow technique on a plain white cake from the market.  It could be a fun way to get your hands a little sticky and surprise everyone, including yourself.  There’s really no right or wrong way for a spiderweb to look… so just go for it!

How to Make a Marshmallow Spiderweb Cake for Halloween | Tutorial by Carrie Sellman for

a DIY by Carrie Sellman


  • Cake
  • White Fondant
  • Marshmallows (8 oz)

STEP 1 : Cover your cake(s) in white fondant.

STEP 2 : Place marshmallows into a microwave-safe bowl.  Heat for 30 seconds.

STEP 3 : Stir marshmallows.  {Warning.  Hot marshmallows will burn.  And it hurts!}

STEP 4 : Keep stirring.

STEP 5 : Stir, stir, stir some more!  Stir until marshmallows are cool enough to touch.

STEP 6 :  This is where it gets messy.  Or fun, depending on how you look at things.  Using both hands, stretch a small glob of marshmallow out into a long, thin, stringy strand.  Way, way longer and thinner than what is shown above (it was hard to get a picture of this exactly… especially with marshmallow covered hands).

STEP 7 :  Start wrapping the stringy marshmallow around your cake.  Go up, down, around and around.  Diagonal.  Every which way.  There is no right or wrong way for a spider web to look.  Just start wrapping.  Go light at first until you get the hang of it.  Less is more!  And thinner strands look better in the end.

STEP 8 :  Continue to pull, stretch and drape marshmallow strings.  Going every direction way you possibly can.

STEP 9:   Cover second tier in marshmallow strings.  Stack both tiers together.

STEP 10 : Add additional marshmallow strings to both tiers, draping some from one tier to the next.  Add a spider with long, spindly legs.  And you’re done!

BAKERS NOTE : I should have taken pictures while making the spider.  My bad.  But he’s made of fondant and very straightforward.  One oval for his body.  A smaller circle for his head.  And eight very long, exaggerated legs to make him extra creepy!  Hey, a big spider had to be responsible for such a crazy cobweb!

ADDITIONAL NOTE :  I realize I could have written this tutorial with much fewer steps.  But I was having fun with sticky marshmallows and my new chalkboard backdrop!  What to do you think?  Do you like it?  Want to see more of it in future posts?

How to Make a Marshmallow Spiderweb Cake for Halloween | Tutorial by Carrie Sellman for

I hope you’ve enjoyed Halloween Week here on the blog!  And I hope you give my creepy, crawly Marshmallow Cobweb Cake a try!  I think even the kiddos would enjoy this tutorial.  Just make sure the marshmallow is cool enough for them to handle safely and be prepared to clean up some sticky hands.  And faces.  And tables.  You get the idea!


UPDATE: I was tremendously honored to work with Country Living Magazine on their 2013 October issue.  As it turns out, they enjoyed playing with melted marshmallows too! I’m honored that my sticky cobweb concept made the cover!


Now, give my super easy Monster Eye Cake a try.

How to make a Monster Eye Cake for Halloween | Tutorial by Carrie Sellman for


Then check out my super easy Witch Hat Cupcakes.
A fun little project with cupcake liners!

How to make witch hat cupcakes for Halloween | Tutorial by Carrie Sellman for


Find all of our Halloween ideas and tutorials in our Halloween Gallery!

DIYs and Cake Tutorials on

Carrie Sellman , Founder & Editor

Carrie Sellman is the Founder & Editor of The Cake Blog. Her work has been published in BRIDES Magazine, Country Living Magazine and featured online at People, Today, Cosmopolitan, Glamour, Redbook, Real Simple, TLC, The Cooking Channel and more.


  1. 6

    Yvonne Herron says

    Wow… very creative, I would have never thought about using marshmallow as a cobweb/spider web. Your cake is very lovely. Even though it suppose be creepy… how can it not, it’s too cute. Lol

  2. 7


    Hi Carrie – I am a first-time visitor to your blog, and I absolutely LOVE this cake! How pretty would something like this be for a Halloween wedding? Yeah, I guess a Halloween wedding would be a little strange, but kind of cool, too… right? 😉 I’ve been sneaking around your blog for the last 20 minutes, and it is dangerously wonderful. Have a great weekend! xo

    • 11

      Carolyn says

      In the magazine article, the cake was frosted with white buttercream frosting. The white-white of the marshmallow looks good against the dingier white color of the buttercream. I’m going to try chocolate buttercream, I’ll wait untill it crusts before I add the cobwebs. I hope it holds up, it’s still warm and humid here in Florida.

  3. 14

    Beverley Munro-Lynch says

    oh this looks so much fun and i love the chalkboard backdrop shows up cake beautifully
    Thank you for sharing with us all.

  4. 30

    Paula says

    This looks Wonderful Love the marshmallow spider webs. Would they attach to a cake iced in chocolate buttercream? Or even on a plain Chocolate or Angelfood Ring cake? Love the ideas<3 Thanks.

  5. 31

    Paula says

    Love the spiderweb concept. Do you think it would work on like hardened chocolate? Would like to do a mimi pumpkin patch with cobwebs. Thanks for the ideas, love your page.

  6. 32

    Julie says

    Carrie, LOVE IT!!! And love the chalkboard backdrop. And to answer your questions, YES AND YES!! Yes do use the chalkboard backdrop again. And Yes, please more tutorials. This tutorial was one of the best, excellent pics to show and excellent directions. One can never ever have enough pics and directions, the more, the better the tutorial. THANK YOU!

    From one of your devoted followers.
    Happy Halloween.

  7. 34

    Nicole says

    I wanna thank “Half Baked”, the FaceBook page, for posting this! 😀 It looks fantastic. Just might have to make it for my Halloween Party. 😉

  8. 35


    This is AWESOME!!!! I wish I would have known about this a week ago! I just had a Halloween themed birthday party yesterday…. There is always next year though :)

  9. 36

    Anne says

    Sooo glad I came across this! My niece’s 3rd birthday party is this Saturday, she wants cupcakes, but this is perfect for the adults cake!! Great idea! Thanks so much for posting it!

  10. 37

    Carrie Sellman says

    Wow – thank you for all of the kind feedback everyone! I hope you have as much sticky fun as I did, if you give it a try!

    For those of you who asked about trying this on buttercream… I think the sturdy base of fondant is best for all of the dragging and draping. The marshmallow really is quite sticky! If you give butttercream a try, let us know how it goes.

    @ Nicole – “Half Baked” the facebook page is me! Half Baked – The Cake Blog – – All one in the same. : )

  11. 48

    Sherry Webb says

    LOVE the cake and ADORE the chalkboard backdrop. What a GREAT idea. I am always looking for portable multi-purpose backdrops and this ticks all the boxes. I am wondering about making something like this and on the reverse side covering that in a corkboard….2 for 1 in a portable package

  12. 50

    johnpaul says

    Asking if  do like it is an understatement am in love so much in love wif that sexy creepy cake of urs Lol

  13. 51


    Hi – love this, saw it a while ago and its just come up on my facebook feed again. Can I ask how you made the spider, as I tried making one a while ago and had all sorts of problems with the legs! Thanks.

  14. 52


    Soooo this is on the cover of Country Living October 2013 – have you seen it?! It looks JUST like your cake. Did they steal your idea?! I didn’t notice a blogger attached the recipe in the article… you might want to look into that because girl, this is too awesome not to get credit for. Just saying… good luck and keep caking!

    • 53

      Carrie Sellman says

      Thanks for looking out for me Melissa!

      I actually worked with Country Living for the October issue. I’m credited in the print issue and on their website. It’s an honor to have my concept on the front cover!! Still in shock every time I see it.

  15. 59

    Maria says

    Hello Carrie,

    The Cake looks fantastic! Question for you, would this work on a meringue buttercream covered cake instead of a fondant covered cake?

    Thanks so much!

  16. 60

    Erin says

    I love this idea and was really excited to bring this cake to a Halloween party. Realize now that I should have made chocolate buttercream for a chocolate cake, and the marshmallows are just too sticky to even pull out a strand. Disappointed this didn’t work out. Think I’ll just cover the cake in chocolate sprinkles and call it a night.

  17. 63

    Allison says

    I love Halloween and I love this idea! A few questions:
    1- How would this look as only one tier?
    2- How far in advance can it be made?


    • 64

      Camille says

      I made this cake with Swiss buttercream and two tiers, but I think it would look just as great with one tier! Perhaps a tall cake, 5 or 6 inches?

      As far as timing, I made mine one day in advance and stored the cake in a cardboard box in the fridge. The marshmallows stayed the same on the cake. It may have been a little shiny, but it didn’t droop or melt off my cake.

      Hope this helps in time. :)

  18. 65

    Camille says

    Hi, I made this cake and it came out quite successfully. I wanted to share with anyone interested that this absolutely works with Swiss meringue buttercream. I iced and stacked a two-tier cake with Swiss and let it sit in the fridge for at least an hour. Then, I melted marshmallows, stirred it around, and let it cool to neutral temperature. This allowed me to decorate with the stringy “cobweb” without melting the buttercream. Working with the marshmallows was a sticky, tricky mess, you’ll soon develop techniques on wrapping the cobwebs. Lol But the cake came out fabulous!!


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