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Cake Slice Party Invitations

by Jessie Daye

First published: February 14, 2014 | Updated: June 10, 2026

Create fake cake slice invitations using car sponges and collage clay that double as party invites.

Cake Slice Party Invitations

Author: Jessie Daye
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Total 2 hours
Create fake cake slice invitations using car sponges and collage clay that double as party invites.
Servings 2 cake slice invitations per car sponge makes

What you need

  • Car Sponges
  • Serrated Knife (or electric Knife)
  • Scissors
  • Collage Clay
  • Hot glue
  • Mini 1/2" styrofoam balls
  • Red Paint
  • Green Paint
  • Mod Melts and mini glue gun
  • Cutting board

Directions

  1. Lay car sponge on cutting board.
  2. Using serrated knife, cut sponge on a bias lengthwise to create two cake slices.
  3. Cut off about 1.5 inches from the end of each slice to make it look like a perfect slice.
  4. Make a groove in the center of each slice by gently cutting two parallel lines.
  5. Using scissors, cut out a small portion of sponge from the groove.
  6. Optional: spray paint sponge dark brown to look like chocolate cake.
  7. Fill groove with collage clay using piping bag.
  8. Smooth frosting with finger.
  9. Stand slice upright and pipe collage clay on top and sides.
  10. 1
  11. Let dry 2 hours to touch, 24 hours to completely dry.
  12. 1
  13. Attach invitation to back.
  14. 1
  15. Can be used for birthdays, baby showers, Valentine's Day, and other occasions.

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Hi, I'm Jessie. 

I’m a Los Angeles mama, home renovator, and lifelong creative, sharing the things that make everyday life a little more beautiful. I believe food is one of the best ways to bring people together, which is why I love cooking: it turns an ordinary Tuesday into something worth remembering. From recipes I make on repeat to DIY projects, home design, and a little bit of real life in between — welcome to my corner of the internet. I’m so glad you’re here.

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