Edible Marshmallow Fluff Slime (No-Cook Recipe!)

Looking for an easy no-cook slime recipe that toddlers and younger kids can safely put in their mouths? This edible marshmallow fluff slime is super smooth, super stretchy and only requires a few taste-safe ingredients to make!

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Perhaps I just haven’t been paying enough attention, but I’d actually never heard of marshmallow fluff until recently.

That being said, with four young kids at home, I’m always on the lookout for new taste-safe activities to try. And because the Rainbow Marshmallow Slime we made recently was such a big hit, I figured marshmallow fluff slime could be as well!

As one might guess, it turns out that marshmallow fluff slime is quite similar to marshmallow slime. But because marshmallow fluff is similar in texture to melted marshmallows, there’s no need to heat anything up—which makes the whole process a lot safer for little helpers!

So if you’re looking for a smooth, taste-safe slime recipe that doesn’t require any cooking, pick up a jar of marshmallow fluff and follow these simple steps!

How to Make Edible Marshmallow Fluff Slime

Required Ingredients

Here’s what you’ll need to whip up a batch of no-cook marshmallow fluff slime at home:

Note: If you live in a colder climate, place your coconut oil in the microwave for a few seconds to melt it before you start making the slime.

Step-by-Step Instructions

1. Mix Cornstarch & Sugar

Start by adding ⅓ cup of cornstarch and ⅓ cup of icing sugar to a medium bowl and stirring them with a spoon.

2. Add Marshmallow Fluff

Once the cornstarch and sugar have been combined, spoon some marshmallow fluff into the bowl. You’ll need to add about 1 cup, but don’t worry about using exact measurements.

Note: It’s very important that you do these steps in order. If you add the marshmallow fluff to the bowl before the cornstarch and sugar, it will stick to the bowl and you’ll have a difficult time mixing it in.

3. Add Food Colouring (Optional)

If you want to add colour to your slime, pour a few drops of food colouring onto the marshmallow fluff before moving on to the next step. (I decided to skip this step for the purposes of this article.)

4. Stir Mixture

Gently stir the ingredients together with a spoon. Don’t be too heavy-handed or the cornstarch and sugar will likely end up outside of the bowl.

5. Knead Slime

Once you’ve gotten as far as you can with the spoon, use your hands to continue mixing the ingredients. You can add a bit of coconut oil to your fingers before you start to help the slime stick less.

Fair warning—even with coconut oil, the mixture will be quite sticky. Just do your best to knead it and when you reach the point where continuing would no longer make any meaningful difference, move on to the next step.

6. Add Coconut Oil

Pour about 1 teaspoon of coconut oil onto the slime and work it in with your fingers. This should make the slime a lot less sticky.

Once you’ve worked all the coconut oil into the slime, it should be ready to play with!

If ever the texture isn’t what you were expecting, feel free to add a bit more cornstarch or coconut oil as needed to reduce the stickiness. Or, if your slime is too stiff, add in some more marshmallow fluff!

This slime was actually surprisingly soft and stretchy. The kids had a blast with it!

I do feel I should warn you, though—it actually tastes pretty good, so you’ll want to supervise to make sure your kids aren’t just snacking on it instead of playing with it. Quite a bit of ours ended up in our children’s mouths!

But although we wish our kids had spent a little less time eating it, this slime was so much fun that we’ll definitely be making it again!

How to Store Marshmallow Fluff Slime

Assuming your kids don’t lick the slime like our one-year-old tends to do, marshmallow fluff slime that is still usable can be stored in an airtight container for a couple days and taken out during play time.

I would recommend storing the slime at room temperature as marshmallow fluff tends to harden when it’s cold.

If you’d rather store your slime in the fridge, you’ll need take it out ahead of time to give it a chance to warm up, or heat it in the microwave for a short amount of time to bring it back to room temperature. (Just make sure not to overheat it!)

Related Taste-Safe Slime Recipes

Looking for more fun slime recipes that your child can eat? Check out these articles:

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