DIY Cookie Monster Costume for Halloween

Ella Elbells
by Ella Elbells
11 Materials
20 Minutes

Hi guys, I am back again making another Halloween costume. This one is a DIY Cookie Monster costume because, let’s be honest, we all love cookies and Cookie Monster is my spirit animal.

Like all the other costumes I make, this one would be a great group costume; each person could go as a different character from Sesame Street using the same method as below to add their character’s face to a t-shirt.

Anyway, without further ado let's get onto the easy DIY Cookie Monster costume.

Tools and materials:

  • Plain blue t-shirt
  • Black adhesive felt
  • White adhesive felt
  • Scissors
  • Shoebox
  • Blue paint
  • Feather boa
  • Hot glue
  • Letter stickers
  • Blue cord (optional)
  • Headband
Creating Cookie Monster eyes

Create the Cookie Monster shirt

First, we're making the shirt for this costume which is basically just a Cookie Monster face on a T-shirt. You will need a plain blue T-shirt and a few sheets of black and white adhesive felt.

1. Begin with the eyes

Start off by tracing 2 circular shapes on your white piece of felt. I like to fold the felt in half and place a circular object on top of it that is the same size I would like the eyes to be. Then just trace around it.


Cutting the eyes out

Cut them out with scissors.


Cut-out eyes on blue t-shirt

Then place them on the shirt making sure they are touching each other.


2. Create a mouth

Creating Cookie Monster mouth

Next up we have the mouth. I found a picture online and copied it onto the back of my black felt. 


Cutting out the mouth

Then I cut it out with scissors.


Placing mouth on t-shirt

Then, placed it on the shirt where the mouth would be.


3. End with the pupils

Creating pupils

Fold a piece of black felt and place a small round object on top. Trace around it to make your pupils.


Cutting out the pupils

Once again cut those out.


Adding pupils to eyes

Place them randomly on the white circles facing inward to capture his cross-eyed look.

Sticking pieces down

4. Stick all the pieces onto the shirt

Once you are happy with the placement of all the pieces, remove the back of the adhesive felt and stick them onto the shirt. The great thing about adhesive felt is it is not permanent so you can always remove it and use the shirt again.

Finished DIY Cookie Monster t-shirt

That is the finished t-shirt for the DIY Cookie Monster costume, isn’t he the sweetest?

Fashion the accessories

Let's move onto the accessories!

Cookie box

Blue shoebox

1. Paint a shoebox blue

The first step is to paint a shoebox blue. You can skip this step if you manage to find a box that is already blue. 


Attaching the feather boa

2. Attach the feather boa

Next, you want to take your blue feather boa and hot glue it to the bottom sides of the box.


Sticking on "cookie" letters

3. Stick on letters

After that, take some fun letter stickers that spell out “cookies” and stick them to the front of the box right above the feather lining.


4. Add cord (optional)

As an optional extra, you can punch holes on either side of the box and thread through some blue cord, tying the ends on the inside of the box. This allows you to wear the box around your neck like a candy vendor.

Completed Cookie Monster box

Here is the final box, it came out so cute and was so simple to make. Onto the last accessory — the headband


Cookie Monster headband

1. Take a headband

Feather boa

2. And feather boa

Wrapping the feather boa around the headband

3. Wrap the headband

Wrap the feather boa around the headband. It is not necessary to secure it as it secures itself quite well, but if you want to be safe you can add some hot glue here and there.


Cookie Monster headband

You will end up with something that looks like this, all fluffy and flowy and perfect for our Cookie Monster Halloween costume.


Completed DIY Cookie Monster costume

Here is the final DIY Cookie Monster costume. I wore everything I made with some blue leggings and Uggs. I absolutely adore how it came out. I would love to know what you guys think in the comments. Have a great Halloween.

Suggested materials:
  • Plain blue t-shirt
  • Black adhesive felt
  • White adhesive felt
See all materials

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