In case you’re not familiar with it, oobleck is a non-Newtonian fluid. That means its viscosity can change from liquid to solid depending on the pressure it’s under. So this chocolate oobleck is both a sensory play material and a science experiment!
This recipe makes great messy fun for kids. It can be used at home or in the classroom for a fun sensory activity. Because it’s taste safe, it can even be used with toddlers or preschoolers.
We’ve made regular oobleck, candy cane (scented) oobleck, and lemonade oobleck. I had the idea of doing a chocolate version because I thought it would be fun with Valentine’s Day coming up. The chocolate smell really brings in the Valentine’s theme.
Once I saw it, I realized that it would make a really great fake mud for sensory play. When my boys were younger, they would have had so much fun driving toy trucks and construction vehicles through this stuff!
So regardless if you use this in a sensory bin with toy vehicles as a safe fake mud or in a Valentine’s theme bin with a heart mould to pretend to make chocolates with, this recipe is where you start!
Chocolate Oobleck Recipe:
Supplies needed:
- 1/4 cup cocoa
- 2 cups cornstarch
- 1 cup plus 2 Tbsp. water
Instructions:
- Mix all ingredients together.
- Get to playing.
Important notes: Make your oobleck on the day you want to play with it as it doesn’t keep longer than a day or two. NEVER dispose of oobleck down the drain as it will clog your drain. Allow it to dry uncovered and then scoop it into the garbage.
When kids squish or squeeze the oobleck, it will act like a solid but when they allow it to fall through their fingers, it acts like a liquid. 
Playing with this oobleck engages the tactile, visual, proprioceptive, and olfactory (smell) sensory systems. It is also taste safe, so technically, it could engage the gustatory system but I wouldn’t recommend eating it as with all that cornstarch, it won’t taste great.
Enjoy the messy, sensory, science fun!
Check out our other oobleck recipes:
