Home » Cake Slice Costume Tutorial! #Boxtumes

Cake Slice Costume Tutorial! #Boxtumes

This is a sponsored campaign between Amazon Prime and CraftyChica.com. All ideas and opinions about this cake slice boxtume are my own.

This cake slice boxtume will rock your world!

Wait, boxtume?

YES! It’s a fun Halloween costume promotion from Amazon Prime to motivate people to put those nifty boxes to use this season! I’m so delighted to have been invited to make a “boxtume” to share with all of you!

This cake slice boxtume is awesome because it can be adapted to your favorite frosted confection. A fluffy birthday cake, a slice of flan, ombre cake, a unicorn cake, angel food, red velvet…you get the picture.

And the best part is that I designed it to go right over your head and rest on your shoulders!

Check out my video below to see the process!

YouTube video


  • 4 large Amazon Smile boxes
  • Duct tape
  • White craft glue
  • 2 jumbo rolls of party streamers (one for the cake, one for the frosting)
  • Scissors
  • Faux frosting (I used Collage Clay)
  • Confetti
  • Brush on varnish, brush
  • White spray paint


Line up two boxes and tape the short ends together, this will be the pointy side of your cake slice.

Stand it upright and open it to the size you want.

Take a third box and line it up to make the back of the cake slice. Draw a line where it extends beyond the cake slice, and cut away excess using scissors or a craft knife.

Line up the back piece and tape to the cake slice.



Take one larger box and lay it flat. Place the cake slice on top. Draw around the shape, cut away excess.

Cut a hole at the top for the head to go through.

Place the cut triangle on top of the cake slice and tape in place.

Cut arm holes on each side.

Secure all edges with tape.




Spray paint the entire base white.

Cut the white party streamers into 16” strips. Fold and fringe with scissors.

Set the cake slice on its side and add a line of white glue along the bottom edge. Set one strip of paper fringe along the glue. Repeat until its time to add the frosting layer, then use the pink party streamer.

Continue until the entire cake is covered.

Repeat for the back of the cake slice, and then the top.

Add extra ruffles up the sides of the cake to look like frosting.

Use brush on varnish to add confetti to the sides of the cake,

Cut a cardboard triangle and decorate with the faux frosting and confetti. Let dry and glue in place on top of the cake. Add faux icing around the edges.


Use a plastic tiara and place it around a paper towel roll. Follow the design of the tiara with the faux frosting. Add confetti and a centerpiece.


And if you want something like Tres Leches, wedding cake, Strawberry Shortcake, Pineapple upside down cake – simply use the square version of the box.


Wear white leggings, or even add a colorful tutu underneath!

Special thanks to Tania from SubcultureRecall for modeling my boxtume! What kind of cake would you make with this boxtume? Leave a comment below!

Thanks to Amazon for sponsoring this post and for inviting me to be a contributor to the Prime Newsletter!

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