How To Make Oobleck Without Cornstarch

Oobleck initially comes from a whimsical tale from a Dr. Seuss book called “Bartholomew and the Oobleck.” The popularity of the sticky green liquid blob falling from the sky lead to teachers and parents experimenting in creating their very own oobleck. 

The original recipe requires 2 cups of cornstarch and 1 cup of water to create the solid yet liquid non-Newtonian mixture that appears to solidify with added pressure. However, can you make a batch without using cornstarch?

While your best guess may be to use flour, wheat flour does not behave similarly to cornstarch. Instead, consider using one of these three ingredients as an effective alternative:

  • Tapioca Powder
  • Baby Powder
  • Baking Soda

How To Make Oobleck With Tapioca Powder

Tapioca powder is the ideal replacement for cornstarch as it behaves similarly to cornstarch. So, here’s how to use tapioca powder interchangeably with cornstarch:

You’ll need:

  • 8.8 oz. (250 g) Tapioca powder
  • 8.4 fl oz. (250 ml) room temperature water

Follow these straightforward directions:

  1. Add the tapioca powder to a bowl.
  2. Now, pour room temperature water into the bowl and mix it thoroughly.
  3. Consider adding extra tapioca powder to the mixture if it seems too runny.
  4. Then, keep stirring until you reach the desired consistency. 
  5. Voilà!

How To Make Oobleck With Baby Powder

Making oobleck with baby powder may sound pretty strange, but it works like a bomb! However, there’s a catch − the baby powder needs to contain cornstarch.

You’ll need:

  • 5.2 oz. (150 g) Baby powder
  • 2.5 fl oz. (75 ml) room temperature water

Here’s how:

  1. Ensure that the baby powder contains cornstarch by scanning the label. The more cornstarch the product has, the better!
  2. Once confident, pour the baby powder into a bowl.
  3. Next, add the room temperature water to the bowl and stir well until you notice the mixture solidifying.
  4. If it feels too watery, add a tiny bit of extra baby powder to thicken the mixture. Note that the type of baby powder you use can significantly affect the consistency. So, play around until you get it right.
  5. Consider adding food coloring to the oobleck to spruce it up a little!

How To Make Oobleck With Baking Soda

Baking soda is an excellent substitute for cornstarch when making oobleck. However, this process takes somewhat longer than the standard method.

You’ll need:

  • 4 fl oz. (120ml) semi-skimmed milk
  • 1 tsp white vinegar
  • ½ tsp baking soda

Follow these straightforward directions:

  1. First, pour the semi-skimmed milk into your bowl.
  2. Then, add the white vinegar and mix well until you notice solid lumps in the mixture.
  3. Next, strain the mixture and squeeze it to remove all the liquid.
  4. Now, add the baking soda to the mix and stir until it reaches the consistency of oobleck.
  5. Lastly, enjoy!

Is Oobleck Edible? Can You Eat Oobleck

Though oobleck is edible, it is not recommended. Eating large amounts of oobleck can cause stomach pains and discomfort.

If your kids accidently ingested oobleck, you don’t need to worry because Oobleck is non toxic as it is made with water and cornstarch.


As you can see, It is possible to make oobleck without cornstarch by using Tapioca Powder, Baby Powder or Baking Soda.

You can make it extra fun by adding food coloring to the water before mixing to brighten up your oobleck.