Simple Science and STEM for Every Day

Edible Marshmallow Slime

Don’t eat that!  But wait, this slime is OK if a nibble happens!  We know some kids are forever going to taste things and some kids are too young to know not to taste everything.  Yet, you still want to make some cool slime or putty with them.  Bring on a fun edible marshallow slime that doubles as a cool putty idea too!   Homemade slime is what we love to play with here!

HOW TO MAKE EDIBLE SLIME WITH MARSHMALLOWS how to make edible slime

EDIBLE SLIME KIDS WILL LOVE

Taste safe or edible slime is not something we do a whole lot of but sometimes you just need an alternative to the classic slime recipes that use liquid starch, saline solution, or borax powder.

This is totally a borax free slime that’s completely non-toxic and perfect for kids who love to sample their activities!

Note:  While this is considered an edible slime, it is not meant to be a food source.  I am pretty sure this isn’t the healthiest thing to consume. However we are talking about safety, so this edible slime is perfectly fine if a little is consumed.

Get our basic slime recipes in an easy to print format so you can knock out the activities!

—>>>  FREE SLIME RECIPE CARDS

MARSHMALLOW SLIME RECIPE

YOU WILL NEED:

CLICK HERE TO MAKE>>> Marshmallow Slime without cornstarch

HOW TO MAKE SLIME WITH MARSHMALLOWS

Note: Adult supervision and assistance highly recommended. The marshmallows will get very HOT in the microwave. Always make sure the materials are cool enough to handle!

STEP 1: Put 6 marshmallows in a microwave safe bowl and pour 1 TBL of oil into the bowl.

STEP 2: Microwave on high for 30 secs. We have a 1200 watt microwave oven so your time may vary slightly.

how to make edible slime with marshmallow recipe

STEP 3: Add 1/2 tablespoon of cornstarch to the heated marshmallows and mix.  We used jumbo marshmallows!

STEP 4:  This mixture will be HOT so please be very careful!  Eventually, as it cools, you are going to want to start kneading it and playing with it.

You may want to mix in another 1/2 tablespoon of cornstarch to thicken a little more. The more cornstarch you add, the stiffer it will get and be more like a putty!

edible slime with marshmallows and cornstarch

The cornstarch will help the marshmallow thicken and form a slime like substance.

PLAYING WITH EDIBLE SLIME!

Stretch it, squeeze it, squish it, and pull it! This edible slime recipe is also awesome for tactile {touch} sensory play and olfactory {smell} sensory play!

Kids will love the way it feels and smells. Read about sensory play here for more great ideas. We have a ton of great sensory play recipes to try out at home like cloud dough and sand foam!

edible slime

Now this edible marshmallow slime is not as oozy as our traditional slime, but it is stretchy and squeezable!  Plus it smells good too!

WHAT HAPPENS WHEN YOU HEAT A MARSHMALLOW?

This edible slime recipe even has a little science to it because of the marshmallows! Have you ever noticed what happens when you put marshmallows in the microwave? They get big and puffy {before they burn if you let them go too long}!

When you heat up a marshmallow, you heat up the molecules in the water that is contained within the marshmallow. These molecules move farther apart. This gives us the squishiness that we are looking for to mix up your Rice Krispy squares or our slime!  The added oil does assist in the pliability and general non drying of the material.

When you add the cornstarch, a natural thickener, you make a thick stretchy substance which is known as the great marshmallow slime! Your hands playing, kneading, stretching, and generally having fun with the slime putty keeps it going.

After a while, as the slime cools down, it’s going to harden. The molecules in the water move closer together again.   So, unfortunately, this slime is not going to last all day or overnight. Yes, we put ours in a plastic bin to see. Our traditional non-edible slime recipes do last a lot longer!

MORE FUN EDIBLE SLIME IDEAS!

MAKE EDIBLE SLIME WITH MARSHMALLOWS

Click on the image below or on the link for more slime recipe ideas!

21+ Amazing Homemade Slime Recipe Ideas for Kids

Marshmallow Slime

  • 6 jumbo marshmallows
  • 1 tbsp cooking oil
  • 1 tbsp cornstarch

  1. Put 6 marshmallows in a microwave safe bowl and pour 1 TBL of oil into the bowl.

  2. Microwave on high for 30 secs. We have a 1200 watt microwave oven so your time may vary slightly.

  3. Add 1/2 tablespoon of cornstarch to the heated marshmallows and mix.  We used jumbo marshmallows!

This mixture will be HOT so please be very careful!  Eventually, as it cools, you are going to want to start kneading it and playing with it.

You may want to mix in another 1/2 tablespoon of cornstarch to thicken a little more. The more cornstarch you add, the stiffer it will get and be more like putty!

Reader Interactions

Comments

  1. Sarah

    Have you used any other thickening agents other than corn starch? I would love to do this with my class but I have a student highly allergic to corn so that rules out corn starch.

  2. Linda

    I had a tough time getting the slime off my hands. After kneading, it was stretchy and pliable like you said, but I couldn’t get it off my hands without finally running them under water. Any suggestions?

  3. littlebins

    You can add a little cooking oil to your hands. Once you make the slime and the ingredients come together finally. You may want to wash hands once after you initially knead the marshmallow mixture just to remove the residue and then add a little oil to your fingers and palms. This is an alternative slime recipe so you won’t really get that rubbery slime feel, but its great when you can’t use those other ingredients or don’t want to!

  4. littlebins

    Powdered sugar is often used in conjunction with cornstarch but I am not sure if it will do the job thickening it on its own. So glad you recognize the allergy though!

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