How to Make Chalk Melts with Plaster of Paris

Let’s make homemade chalk melts!

Wait, did I just say chalk melts?

Yes, I did and our homemade chalk melts in fun shapes and colors are going to become your child’s new favorite way to use chalk! 

Make our easy and fun homemade chalk melts in fun shapes and colors.

What is a chalk melt?

A chalk melt is a soft chalk recipe that you add extra stability through the process of freezing overnight. Kids love using chalk melts for sidewalk and driveway art because the color transfers easily to those surfaces with deeper color intensity and less pressure. 

It reminds me of using pastels for drawing. Chalk melts are great for younger kids who don’t have the coordination to push down hard while drawing or artists of any age that want to control the color more easily.

This activity can get a little messy but that is a big part of the fun!

How to Make Homemade Chalk Melts

These chalk melts are easy to make. Even if you are planning on putting them into an Easter basket or stocking, you may want the kids to help just because it is fun.

We originally created this homemade chalk melts recipe for a guest post on the Imperial Sugar site.

This article contains affiliate links.

You need a silicone mold, plaster of paris, tempera paint, water, and sugar to make chalk melts.
Gather Plaster of Paris, tempera paint, and silicone molds to make chalk melts.

Supplies to make chalk melts

  • 3/4th cup Plaster of Paris
  • 2-4 tablespoons Tempera Paint — you choose the color & intensity
  • 1/4 cup sugar
  • 1 cup COLD water
  • Silicone molds — such as this Heart silicone mold
  • Mixing bowl – or we did small batches like this one in large paper cups so we could mix different colors for the different molds
  • Wooden spoon or stick for mixing

Instructions for making chalk melts

Step 1 for making chalk melts is to combine the tempera paint and sugar in a bowl.
Combine the tempera paint and sugar in a bowl until completely mixed.

Step 1

Combine the sugar and tempera paint in a bowl (or large cup) and mix together completely with a wood stick or spoon.

Craft tip: We added 3 tablespoons of tempera paint for each color that we mixed.

Step 2 for making chalk melts is to add water to the sugar and paint mixture and to combine thoroughly.
Add cold water to the paint and sugar mixture and combine until dissolved.

Step 2

Add the cold water and mix until the entire sugary mixture is dissolved.

Step 3 for making chalk melts is to add plaster of paris to the liquid paint mixture and stir until there are no clumps.
Add Plaster of Paris to the liquid paint mixture.

Step 3

Add the 3/4th cup of Plaster of Paris and continue stirring until there are no clumps.

The final step for making chalk melts is to pour the mixture into silicone molds and freeze them for at least 24 hours.
Pour your chalk melt mixture into silicone molds and freeze for at least 24 hours.

Step 4

Pour the mixture into the silicone mold, and then freeze it for at least 24 hours. Pop your homemade chalk out of silicone molds when you are ready to use them. 

Craft tip: You can also make batches of these by freezing them in the molds and then transferring them into another container to leave in the freezer until you are ready to use them.

Repeat steps 1 through 4 for as many colors and shapes as you desire!

Our finished chalk melts
homemade chalk melts shaped like lightning bolts, LEGO bricks and hearts.
Make fun chalk melts shapes like our lightning bolts, LEGO blocks, and hearts.

Our experience with chalk melts

What I like about using this recipe is that it is really easy for their little fingers to get the color on the highly textured driveway without a lot of effort.

A flower drawn on a sidewalk with homemade chalk melts.
Make all kinds of fun designs on your sidewalk or driveway with chalk melts.

The kids’ hands get really messy with color, but because we used a washable tempera paint, a little hose water will clean them up thoroughly before letting them back in the house!

Easter BUNNY Chalk MELTS

Easter Chalk Melts
Super cute Easter bunny chalk melts.

As we mentioned above, we created these Easter bunny chalk melts for the Imperial Sugar website. You don’t have to use just bunny shapes! You can make an egg shape as well. It’ll fit in a small egg carton, making them extra cute for Easter.

We found these cool shapes:

You can make the chalk in pastel colors, dark colors, vibrant colors, or whatever color you want.

If you make them small enough the chalk can fit into plastic Easter eggs.

If you are using Easter baskets fill them with Easter grass or another filler. You will need to give the baskets within a few hours. Don’t leave them sitting in the sun, or wait until the last moment to add them to the basket. You can individually wrap them too.

I think if you treat them like you would a chocolate bunny – not leaving in sun, etc. – it will work great!

With Easter right around the corner, now is the perfect time to make these and head outside for some good, melting fun!

Yield: 10

How to Make Chalk Melts

How to Make Chalk Melts

Let's make homemade chalk melts using tempera paint and Plaster of Paris.

Prep Time 10 minutes
Active Time 30 minutes
Additional Time 1 day
Total Time 1 day 40 minutes
Difficulty Medium

Materials

  • 3/4th cup Plaster of Paris
  • 2-4 Tablespoons Tempera Paint -- you choose the color & intensity
  • 1/4 cup Sugar
  • 1 cup COLD water

Tools

  • Silicone molds
  • Mixing bowl - or we did small batches like this one in paper cups so we could do each a different color
  • Wooden spoon or stick for mixing

Instructions

  1. Start with 1/4th cup of sugar in the bowl.
  2. Add the tempera paint color of your choice to the sugar and mix with a spoon or stick.
  3. Add the cold water until the entire sugary mixture is dissolved.
  4. Add the 3/4th cup of Plaster of Paris stirring until there is no clumps.
  5. Pour the mixture into the silicone mold.
  6. Freeze overnight (or longer) and pop out of silicone molds when ready for use.  You can also make batches of these by freezing in the molds and then popping them out when frozen into another container to leave in the freezer until use.
  7. Repeat the process for as many colors as you desire!

More chalk ideas from Kids Activities Blog

Did you have fun with your chalk melts? What shapes did you make?