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How To Easily Make Crayons In The Oven With Silicone Molds

4 mutli-colored new heart crayons made from crayons melting in oven in silicone heart molds.

Get the whole family involved in making DIY crayons in your oven 

Do you have a bunch of crayons laying around? This is the coolest way to recycle and use those old crayons to make new crayons using silicone molds

These DIY crayons are perfect for treat bags, Valentine’s party favors and gifts. We are so excited to use our homemade heart crayons soon. 

heart silicone molds, with bag of old crayons on shiplap.

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Supplies

Water cup with warm water

Oven

Oven mitt

Cookie sheet (optional to cover with aluminum foil)

Silicone molds (these ones are similar to what we used)

Note we got our silicone molds on sale at Michael’s after Valentine’s Day.

Can you use silicone molds for crayons?

Yes, you most certainly can. Silicone molds come in all sorts of shapes, sizes and designs and are a great way to recycle old crayons into brand new creative ones in your oven. 

hand holding silicone molds with crayons in background.

Where can you buy silicone molds?

We were so lucky when walking through the clearance section at our local craft store after Valentine’s Day. We were able to score these heart molds for less than a dollar each. My only regret was I did not buy more. Baking molds like ours always go on sale once the holiday is over and you can find them in so many fun shapes.

Other molds we may consider buying to make more crayons

Can silicone molds go in the oven?

Yes, these make sure that you are purchasing silicone molds that say oven safe. Our molds said they were oven safe, freezer safe and heat resistant up to 450 degrees Fahrenheit. 

How to easily peel crayons

Seriously I wish I had known this sooner from other crayon art and craft projects we have done. Soak the crayons in warm water for about 10-15  minutes. Some of the papers will honestly just fall off. You can even twist your hands over the paper to easily get some of the more stubborn crayons papers to come off. 

blue solo cup with water soaking crayons before peeling.

We think the water technique is the best way to get the paper wrapper off. But, you can also take an Exacto knife and cut the paper off. However, that is not really the family-friendly way to get it done.

Instead, get the whole family involved by helping to peel and break crayons. This is such a fun way to help little ones build hand strength. Note that the smaller the pieces you break, the faster the crayons will melt. We actually liked having a little larger pieces. We think that it gave our silicone mold crayons a little more of a tie-dye effect instead of just all melting to make new solid colors.

pile of unwrapped crayons in different colors on paper towel.

What if you don’t want to peel the paper wrappers off the crayons?

Please don’t put the paper in the oven. However, you can purchase unwrapped crayons if you are in a pinch for your own DIY crayons. 

Different ways to consider melting crayons

We do know you could use a heat gun, microwave or even a blow dryer to melt crayons. However, the oven really is the easiest way. 

How to involve the family in crayon making

Even the youngest children can help make decisions about the colors they are using in this fun project. Our oldest was able to even understand that red and green might not work out too well because they are opposite on the color wheel. 

Without even realizing it our children were discussing the primary colors, similar colors and color theory well trying to guess how their new crayons may come out. It truly is so much fun and doesn’t cost much to do.

crayons in silicone heart mold on baking sheet.

We did attempt a rainbow crayon, but the darker colors seemed to overtake the brighter ones. Colors that are similar or next to each other the color wheel seemed to work better than too many different colors.

We also loved when the white crayon melted in. The best part about this fun idea is that you can just experiment with colors and see what happens!

green homemade heart crayon in hand with other tie dye looking heart crayons in the background.

What crayons are best to use?

It is odd enough that our past experiences confirmed that Crayola crayons are the most vibrant and easiest to melt. Some of the other brands of crayons actually take a little bit longer.

We know this from doing different melt crayon canvas projects with a hair dryer. However, really any brand of crayon you have will work to create fun new crayons in different shapes and sizes using molds and your oven.

What if I don’t have silicone molds for crayon making?

If you don’t have silicone molds you could try melting crayons in old mini muffin tins or using old metal cookie cutters on parchment paper.

How to melt crayons in the oven in your silicone molds

Step 1: Peel the crayon wrapper off of the crayons. Soaking in water for 10 minutes can really help with the process.

Crayola crayons soaking in a water cup near sink.

Step 2: Preheat the oven to 300 degrees Fahrenheit.

Step 3: Place broken crayon pieces in molds. Overfill the molds (especially if they are like are smaller hearts). The crayons melt to fill every empty space. 

small crayons pieces in heart molds before going in the oven.

Step 4: Put silicone mold on a cookie sheet before putting it in the oven.

heart silicone mold on cookie sheet in oven with crayons melting.

Step 5: For the small molds, cook for 8-10 minutes. make sure to watch for when they are fully melted. You do not want to overcook them.

Step 6: Once you see that the crayons have fully melted, pull them out of the oven immediately. The wax will be very hot and liquid. How long your newly formed crayons need to cool will depend on the size of your molds. 

melted crayon wax in red heart silicone molds in oven.

In the image below, you can see that the melted wax has solidified and was cool to the touch after about 20 minutes.

Larger DIY crayons in silicone crayon molds after cooling down.

Step 7: Once one is completely cool to the touch, you can carefully push it out of the heart mold.

hand bending back silicone mold holding DIY heart crayon.

Adult supervision is definitely needed

Warning! My kids were very excited to see the crayons. Even with me standing right there they were tempted to touch the pan or melted wax. It all looks very cool, but make sure you don’t let anyone touch the hot surfaces and hot wax.

You also want to be careful when handling the baking sheet and crayon molds. Also, don’t leave them unattended because you never know who might get curious.

xoxo heart crayon with yellow, green and white in hand.

Notes on melting times

Please note: our large molds took about 12 minutes at 300 F and took about 30 minutes before I was comfortable pulling the crayons out of the molds. Do not rush this part. You don’t want to break your awesome creations.

We also tried to melt the crayons at 200 degrees F, but it just was taking too long so we found the sweet spot with the 300 degrees Fahrenheit. Remember just like with baking all things can vary, so just keep a close eye on your melted crayon wax as it is happening. 

Factors that may change your melting time

  • The size you cut or broke your crayons. Small pieces will not take nearly as long to melt as larger pieces.
  • Your molds are different sizes.
  • Your oven runs differently than mine (sorry not really a baker to tell you why)
  • The brand of crayons or even colors used. In past crayon projects, we have found that certain colors have a higher melting point than other colors.

DIY crayons melted in oven in silicone heart molds with different sayings on them.

Want another amazing crafty idea that is super budget-friendly?

Make super-soft playdough with our DIY no cream of tartar slow cooker playdough recipe! Honestly, your kids will play with it for hours and you can make it with items in your pantry!

Follow us on Pinterest or YouTube for more arts and craft ideas!

variety of heart rainbow crayons melted in oven.

Free printable instructions!

Yield: DIY Heart Crayons

How To Melt Crayons In Your Oven Using Silicone Molds

DIY crayons melted in oven in silicone heart molds with different sayings on them.

Make new rainbow crayons by melting crayons in your oven in silicone molds. This easy craft project is fun for the whole family.

Prep Time 10 minutes
Active Time 15 minutes
Additional Time 20 minutes
Total Time 45 minutes
Difficulty Easy
Estimated Cost Less than $5

Tools

  • Oven
  • Cookie Sheet
  • Cup of warm water

Instructions

  1. Preheat the oven to 300 degrees Fahrenheit.
  2. Place peeled and broken crayon pieces in molds. Overfill the molds (especially if they are like are smaller hearts). The crayons melt to fill every empty space. 
  3. Put silicone mold on a cookie sheet before putting it in the oven.
  4. For the small molds, they needed 8-10 minutes.
  5. Once you see that the crayons have fully melted, pull them out of the oven immediately.
  6. The wax will be very hot and liquid. How long your newly formed crayons need to cool will depend on the size of your molds. 
  7. Once one is completely cool to the touch, you can carefully push it out of the heart mold.

Notes

Adult supervision is required! Don't leave young children unattended with hot wax.

My family honestly couldn’t believe how awesome our DIY crayons looked once we could peel them out of the heart molds!

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