How to make slime using Cornstarch


Having a child with sensitive skin makes it hard to make traditional slime. Since making slime is something that all my kids love to do, I wanted to find a way that everyone could have fun since Borax can aggravate some people’s skin, especially among children. This cornstarch slime recipe, also known as “Oobleck” does the trick for us every time!

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Our Family Cornstarch Slime Recipe

1 Cup Cornstarch
1/2 Cup Water
1 Bowl
1 resealable bag
Glitter for color (optional)
Pour Cornstarch into a bowl. Add water slowly while mixing the ingredients with your hands. Add color (optional). Transfer slime in a resealable bag. Store slime in the refrigerator. You may need to mix it each time before using.
*Also remember that you cannot dump slime down the drain because it can clog your drain.



Tips and a Variation

When you add your water, you want to really make sure you add the water slowly. While the recipe is a guide, sometimes things interact differently. Being patient and taking it slow will give you a better cornstarch slime or oobleck.

If you want a thicker cornstarch slime, instead of using water, use regular old white glue. Add glitter if you desire and then add your cornstarch gradually. You will want twice as much cornstarch as glue. If you use less, it will be more runny. If you use more, it may be a little too thick.

In the end, you may have to experiment with it a bit to get the consistency you want. Consider it a fun science experience!

Authors note: I hope that you found this tutorial helpful. This has been one of my most popular posts of all time. I posted this before pictures on blogs were really that big of a deal and will update the pictures at some point. I have had some people love it and others hate it. The most important thing is to have fun with it!

cornstarch slime oobleck






  1. Jeanette
    June 27, 2011 at 12:46 pm

    This is a great recipe – I had never made slime before as my recipe calls for Borax as well and it just never seemed mild enough for us. Thanks so much for sharing!

    • bearhaven
      June 28, 2011 at 3:15 am

      You are welcome. My daughter is very sensitive, so I didn’t want to make anything that would irritate her skin.

  2. anysnail
    June 27, 2011 at 8:36 pm

    did you know that the slime you are making is a newtonian fluid? i did.

    • bearhaven
      June 28, 2011 at 3:08 am

      I did not know that.

    • Jim Kirk
      June 28, 2016 at 2:22 am

      Nonnewtonian. A newtonian fluid has a constant viscosity while a nonnewtonian fluid changes viscosity depending on the force applied to it.

  3. Aimee
    July 1, 2011 at 5:13 pm

    Oh- my kids would love this, I will have to try it & Thanks for linking it up to The SUnday SHowcase!

    • lila
      January 21, 2018 at 9:50 am

      it turns into oobleck i dont think it is slime but it is a great recipe!

  4. Lila
    February 28, 2013 at 4:12 pm

    My son has very sensitive skin and he is allergic to an ingredient in borox. This recipe is better than any other and it does not irrtate his skin. Thanks!!! 🙂

    • bearhaven
      March 18, 2013 at 7:48 pm

      Happy to help!

  5. hjg
    May 6, 2014 at 2:53 pm

    this is a great project

  6. Winter Survival for Moms!: Winter Activities for Kids | A Life in Balance
    January 23, 2015 at 3:01 pm

    […] How to make slime using Cornstarch | Bear Haven Mama […]

  7. Hannah
    July 20, 2015 at 12:14 pm

    Thank you my family doesn’t use borax

  8. Nicole
    November 3, 2015 at 9:38 am

    Wow this is amazing even my 13 year old likes it!

  9. mia
    May 19, 2016 at 7:24 pm

    thanks for making this.

  10. Bear Haven Mama
    May 23, 2016 at 8:53 pm

    My kids were younger when we started making it. It is more goo because of the cornstarch. We can’t use harsh chemicals because my daughter has exzema

    • Tyra
      January 27, 2017 at 1:01 pm

      This is so fun to play with thanks

  11. Kawehi
    June 25, 2016 at 10:45 am

    When I followed the instructions it disolved and looked like milk so I put it in the fridge will it turn into slime then or is it good now

    • Juliana Coppola
      August 21, 2016 at 1:50 pm

      That happend to me also!

  12. Misfit Mama Bear Haven
    August 23, 2016 at 12:55 pm

    It may not all have the same consistency. I haven’t made this in a while because the older kids are too cool now…or so they think. It did work well for us when they younger because my daughter could not use a lot of the other recipes because of her skin allergy

    • Amy
      November 21, 2016 at 4:41 pm

      Thanks I have been looking for an easy project for my kids?????????????????????????????

  13. Savannah
    September 25, 2016 at 12:18 am

    How long does it need to be in the fridge??

  14. Lilly
    November 5, 2016 at 5:06 pm

    Is borax like a powdery detergent??

  15. natalie
    November 16, 2016 at 7:47 pm

    This is not called slime at all. It is called oobleck.

  16. natalie
    November 16, 2016 at 7:48 pm

    I have eczema too! I have had it since I was 5.

    • Misfit Mama Bear Haven
      November 16, 2016 at 10:40 pm

      Sissy has had it since infancy. My other two don’t have it at all

  17. natalie
    November 16, 2016 at 7:49 pm

    I was not hating when I said this wsa oobleck. I am letting you know what this is called.

    • Misfit Mama Bear Haven
      November 16, 2016 at 10:39 pm

      It is all good. I wrote this one so long ago and kept it simple. I am honestly always surprised that it is still circulating. I hope that you had fun making it!

  18. Isabela
    November 17, 2016 at 7:07 am

    Great job!! You made a lot of people happy, thanks. Every time I made slime, it would never work or I would run out of an ingredient by making too much slime. (Lol) Thus is wonderful

  19. Karianna
    January 21, 2017 at 11:23 am

    I hope this works I am about to try this!!!!! 🙂

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