How to mold a hard boiled egg

September 26, 2010

in decorations,how-to

I had so much fun making eggs for the Behemoth’s contest so I thought I’d do a how -to so you too can make oddly shaped hard boiled eggs on your own!
What do they taste like? You should make one and find out by yourself.

molded hard boiled eggs!

From the left (clock-wise): Pyramid, sphere, square, and cuboid.

[How to make a cube shaped & pyramid shaped hard boiled egg]
- Eggs (the measurements for the mold is for LARGE egg)
- Milk carton or any juice carton (cut open, washed well and dried)
- Stapler (I’ve tried using different kind of tapes but almost all tapes were useless against moisture so save yourself the trouble and use a stapler.)
- Scissors
- Rubber bands
- Paper towel
- Plastic wrap (for a pyramid shaped egg)

Step 1: Make a mold!
Cube: Cut a milk carton like the photo below. Make sure you have tabs (the pink part in the photo) to use to staple the box together. For a cube, cut three extra square pieces that are slightly smaller than the squares on the box (so they’ll fit inside the box). The pieces are used to cover the staples on the inside of the box.)

How to make a cube shaped egg


How to make a cube shaped egg

You don't need to staple the bottom part. The rubber band will do the job.

How to make a cube shaped egg

Cover the stapled sides with the smaller square pieces.

Pyramid: Cut a milk carton like in the photo below. Make sure you have the tab (the pink part in the photo) in order to staple the box together. Cut two extra triangle pieces that are slightly smaller than the triangle on the box. These will be used to cover the staples inside.

How to make a pyramid shaped egg


How to make a pyramid shaped egg

I only used one staple to put together the pyramid box.

Step 2: Make hard boiled eggs! Plunge them into cold water. (It makes it easier to peel.)
A bit off topic, but someone emailed me asking how to get rid of the stinky egg smell from a hard boiled egg. The smell comes from the reaction of iron in the egg yolk and sulfur in the egg white when the egg is heated inside the egg shell and the smell gets stronger as the reaction goes on longer. So if you cook the egg  just right, your hard boiled egg doesn’t smell! How do you know when you over cook your egg? If the yolk is green-gray-ish on the outside, that means you over-cooked it. There are many websites to help you make the perfect hard boiled egg so try them and find the right method for you.
For more information about hard boiled egg, check out this site. http://www.exploratorium.edu/cooking/eggs/explore-text.html (they talk about the stinky smell of egg in ” Cold-water plunge?” on the page)

Step 3: Peel the egg carefully and put an egg in the mold. Place the extra carton piece on top of the egg and push the egg in slowly.
Cube & Pyramid: If the carton piece can be pushed down lower than the edges of the box, put a folded paper towel on the top of the carton piece and put rubber bands around it.

How to make a cube shaped egg

Make sure you push the egg in until you can't push in any further.

Pyramid: The mold for a pyramid egg was just the right size, but because of its shape it was hard to put rubber bands around to secure the top. So I wrapped the mold with plastic wrap, put paper towels on the top (so the rubber bands wouldn’t make indentations on the egg.)

How to make a pyramid shaped egg

Slowly push the top down...

How to make a pyramid shaped egg

Pyramid: It doesn't look like it's supposed to be in the fridge, does it? It might be better to let your family know what you're doing.

Step 4: Put it in the fridge for about 15 minutes or so and slowly take the egg out.

How to make a cube shaped egg


How to make a pyramid shaped egg


This how-to is basically “make a mold and squeeze a hard boiled egg in” and not much else to it. The hardest part was to figure out the right size for the mold for a large egg. I tried a couple of different measurements and finally found the right size.  The first cube mold I made was too small and that’s how the cuboid shaped egg was made.

I know that some company sells a device to make an egg into a cube, so if you aren’t crafty but still want to make a cube shaped hard boiled egg, Google “Egg Cuber.”

Non-Bento #27: BattleBlock Theater themed eggy!

I made Hatty from BattleBlock Theater using a cube mold.

[How to make a spherical  hard boiled egg]
- Hard boiled egg

I wasn’t going to do a how-to for this, but my boyfriend was amazed at how round one of the eggs was and asked me how I did it. All you have to do is put the index finger on the top of the egg, and the thumb on the bottom of the egg and squeeze for at least ten seconds. It pretty much stays like that even after you let go with your fingers.

How to make a round egg

My boyfriend said it looked like a turtle egg.

I’m not sure what you can do with these molded eggs to be honest, other than… purely for fun!

I’m sure you’ve seen them in various bento sites, but I also have Japanese egg molds. I got them out of curiosity a long time ago. I just wanted to see a molded hard-boiled egg. It’s amazing how flexible hard boiled eggs are.

Japanese egg mold

Cute, aren't they? Too bad I rarely use them.

I have another how-to for an easy egg molding trick ready, but I’m going to post it separately so they’re nicely organized, so check back often!

How to mold a hard boiled egg on my flickr

For more pictures of my bento, visit Bento! set and Bento details! set on my flickr page.

If you have any questions about any of my how-to’s, please feel free to leave a comment or email me at AnnaTheRed[at]gmail.com!

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{ 19 comments… read them below or add one }

Cathy/ShowFoodChefNo Gravatar February 15, 2011 at 12:36 pm

So adorable – thanks for the ideas!


TinaNo Gravatar February 19, 2011 at 7:21 pm

I have a Japanese egg mold; however, when I tried it, my egg was too big. I usually have “large” eggs. Do you have this problem when you use your Japanese molds or do you use a different sized egg?


AnnaTheRedNo Gravatar February 24, 2011 at 1:42 am

I have bunny and bear egg molds, but I have the opposite problem with mine. If I use a large egg with the mold, it’ll always get a bubble (gap) somewhere on the egg, so I flip the egg to hide the bubble. :P Freshly boiled eggs are super flexible, so maybe you can try putting the egg into the mold immediately after you cook and peel the shell. Good luck!


SamNo Gravatar March 18, 2011 at 9:46 am

I’ve tried using molds before, and according to the directions, you’re supposed to peel it right when it’s hot and then stuff it in the mold and then put it in the ice water.

Maybe I missed it somewhere, but is there a way to peel the eggs without scorching your fingers? Or in your directions, when you say to put it in the water, do you leave it long enough to cool so that it’s safer?


AnnaTheRedNo Gravatar March 28, 2011 at 6:46 pm

Hi Sam
I completely understand what you mean. Freshly boiled eggs can be surprisingly hot. When I used the plastic molds, I put freshly boiled eggs in a bowl, running cold water and peeled them under the water. Just try peeling it as fast as you can. Good luck!


MeagNo Gravatar April 15, 2014 at 3:30 am

A teaspoon of baking soda when you boil it. Won’t help with the temperature but it should come off quicker.


ShreelaNo Gravatar March 5, 2011 at 7:23 pm

There’s no comment on the heart-shaped eggs page, so I’ll comment on this page. I’m going to make heart-shaped eggs, then pickle them with enough beet juice to make them pink, thanks ^_^


HannahNo Gravatar February 2, 2012 at 1:45 pm

Oh my gosh what a sweet idea! You miss, are a genius. Props! <3


kevmaloneNo Gravatar February 18, 2012 at 3:25 pm

Thank you very much for this.
My wife’s new bento is too small to fit a whole regular sized egg, This is perfect.


criscrisNo Gravatar May 6, 2012 at 11:42 am

Wonderful ideas! Thanks for sharing ! ^^


Egg Master (Lissue)No Gravatar April 2, 2013 at 7:17 pm

Why does your icon have an egg with only one side of hair? I would love to spend my days shaping eggs. Any more shape ideas? Maybe a cow, or a tree. I love it!!! My neighbor is an egg, maybe you should shape her!!!


ChicoNo Gravatar May 5, 2013 at 2:47 pm

Because it’s a ponytail! Dah!


AnushkaNo Gravatar May 22, 2013 at 5:17 am

the heart shaped eggs are super cute.. my boyfriend loves eggs and m going to make them for him right away.. thanks :) xoxo


Barbera CoffeeNo Gravatar June 5, 2013 at 3:28 am

Great ideas, we’ll send them to our Chef Lois! Thanks!


EBNo Gravatar February 13, 2014 at 11:23 pm

I have a small silicone mold that looks like a brain. I’m going to try this with that mold, I bet it will work, and would be great for Halloween. Fingers crossed!!


AngiNo Gravatar April 15, 2014 at 11:44 am

Can you use cookie mold pan? And just press it down with a cookie sheet. Like you’d find at Walmart?


BetteNo Gravatar May 2, 2014 at 11:20 am

Can you tell me where you can buy the japanese molds for hard boiled eggs,they are so cute. I live in Oklahoma.


NaomiNo Gravatar May 14, 2014 at 2:27 pm

They have them on ebay… just look-up bento box egg molds.


margarita carrionNo Gravatar May 7, 2014 at 12:27 pm

I like your blog very interesting things to do with eggs. what else have u got kids and adults love this.


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