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How to make crayons in the oven: the ultimate guide

Want to make your own recycled crayons? Here’s a step by step guide on how to make crayons in the oven!

One of my favorite special things to do for various holidays is to make rainbow crayons!

I love activities that double up – just like making play dough, my kids enjoy the making as much as they enjoy the final product!

It’s really easy to make recycled crayons, and if you already have a bunch of crayons on hand, it can be a zero cost project. Win, win, win!

What to do with homemade crayons

Homemade crayons can be used for:

  • party favors
  • birthday gifts (super cute to spell out a kid’s name or match to the party theme)
  • easter basket filler
  • class gifts
  • just a fun kids craft to do at home and use for coloring!

Silicone molds for making DIY crayons

silicone molds

Where to get silicone molds for making crayons

How do you make crayon letter molds?

Letter crayons are awesome for making personalized birthday gifts. I recommend these letter molds!

How do you clean silicone molds for melting crayons?

Once the crayon wax has fully dried, any drips or drops should peel off easily. You can always put the mold in the freezer for 1 hour to make it firm up even more and peel right off.

making bunny crayons in silicone mold

Can silicone molds go in the oven?

Silicone molds can be used safely through oven, dishwasher, freezer, or microwave.

How do you melt crayons without a silicone mold?

  • Muffin tins – you may need to place in freezer to shrink crayons enough to pop out easily
  • Cookie cutters – line a baking sheet with parchment paper, top with metal cookie cutters, and fill with crayons just like the crayon molds
  • Candy molds

Be sure to check out my best tips for how to store & organize crayons!

How to get the wrappers off of crayons

The easiest way to get the wrappers off of crayons is to cut the wrapper lengthwise with an exacto knife or sharp blade and peel off.

You can also soak crayons in water for at least an hour, which makes the paper wrappers softer and peel easier.

red white and blue crayons

Hack to avoid having to peel crayons

But, easiest is my favorite hack: buy unwrapped crayons.

I use these off Amazon.

They only come in 9 colors, but it’s so much more convenient. Whoever started selling these had a great idea!

What brand of crayons melt the best?

I’ve melted Crayola, crayzart, walmart brand, restaurant crayons, and random unbranded Amazon crayons. All of them melted the same! I find crayola colors the best and has the most pigment, but for actual melting it makes zero difference.

toddler breaking crayons for mold

How to involve kids when making crayons in molds

Get your kids involved! They can peel the paper, break crayons, and put crayon pieces in the molds.

You can also do some simple learning with the following topics.

Color identification

What color is each crayon?


Count the crayons! How many pieces fit in each mold?


Sort by color, or if using broken crayons, sort by size!

How to make crayons in the oven the ultimate guide

How to melt crayons in the oven

Supplies needed:

How full do I fill silicone molds when melting crayons?

Fill the molds so they are heaping full overflowing. As the crayons melt, they fill up every nook and cranny left behind, and compact a lot!

Of course, if you don’t have enough to fill them up all the way, it’s fine. But expect it to go down a lot when melted! You don’t want the crayons thinner than an actual crayon (I prefer 1 inch or thicker) or they will break easily!

making bunny crayons in silicone mold

Can you melt crayons in the microwave?

Yes you can, though it’s a bit more of a process. Remove the wrappers, break the crayons, and sort them by colors. You will have to melt them color by color or risk colors mixing too much and making brown.

Melt the crayons in paper cups (or a microwave safe container you don’t mind ruining). Then, pour into the molds and let solidify in place.

You will want to microwave it like you are melting chocolate chips – 1 minute at first, then stir, then 30 seconds at a time, stirring until it’s well melted.

How do you melt crayons in silicone molds in the microwave?

Because of the stirring and potential splatter required, it’s easier to melt crayons in a cup than in the molds directly in the microwave.

making bunny crayons in silicone mold

Can you melt crayons with a heat gun?

I used a heat gun with silicone molds when I made resin letters for my kids for Christmas.

Just beware that the heat gun is hands on – you have to stand there and hold it – and not really kid friendly.

Also, heat guns blow a bit (like lil hair dryers) and can cause crayon wax splatter if the molds are very full.

What is the easiest way to melt crayons?

I think that the oven is by far the easiest way to melt crayons!

Is melting crayons toxic?

I can’t say whether melting crayons is toxic, but it definitely releases odors and fumes. Be sure to have a fan on or the window open to help with ventilation.

melted crayons in a star mold

Instructions on how to melt crayons in the oven

STEP 1: Pre-heat the oven

Preheat your oven to 250 degrees.

STEP 2: Prep the crayons

First you will need to prep your crayons. If you are using regular crayons, you will need to remove the wrappers.

Soaking the crayons in water for 30 minutes first can make it easier.

You also can use an exacto knife or scissor blade to slice each label lengthwise to make them easier to peel the paper off.

But, easiest is my favorite hack: buy unwrapped crayons.

I use these off Amazon.

Break each crayon into pieces 1 inch or smaller in length. The smaller your molds, the more small pieces you will need.

This is a fun step for kids to do! My 2 year old could break the crayons in half, smaller pieces were a little harder for him.

toddler breaking crayons for mold

STEP 3: Fill the molds

Add the crayon pieces to the molds. You want them to be overflowing because when the crayons melt, they “shrink”, or really just have to fill all the gaps between the whole crayons.

Fill each mold with the broken crayon colors of your choice.

I personally like the look of 2-3 colors per mold, but I let Luke take the lead so some ended up with all the colors. Whatever!

heart shaped mold filled with broken crayons

STEP 4: Melt the crayons

Place the silicone mold in the oven. I prefer to first put the mold on a baking sheet, just for added stability.

Bake for 15-20 minutes, until completely melted.

Love melting crayons? Check out my hair dryer melted crayon art!

melted crayons in a silicone heart shaped mold

STEP 5: Optional: Freeze

When the crayons are out of the oven, I actually like to put them in the freezer. Make sure you have a cleared out, flat space.

This will allow them to solidify quickly and very firmly!

homemade heart shaped crayons
toddler hand picking up heart shaped crayons
sorting and counting crayons

How to make crayons in the oven

Yield: 1 tray of crayons
Active Time: 15 minutes
Total Time: 15 minutes
Difficulty: easy
Estimated Cost: $0-10

Here's how easy it is to melt crayons in the oven and create recycled rainbow crayons!


  • Broken, peeled crayons


  • Silicone mold
  • Baking sheet
  • Oven


  1. Preheat oven to 250 degrees
  2. Unwrap your crayons
  3. Break into pieces small enough to fit in the molds
  4. Fill molds until they are overflowing
  5. Place molds on a cookie sheet
  6. Bake for 15-20 minutes until fully melted
  7. Remove from oven and let cool completely - you can freeze them to speed this up
  8. Pop out of the molds and enjoy

Thanks for reading!

celebrating with kids about us image

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