Inside: Bright green slime cookies that are perfect for Halloween or anytime for your favorite slime fanatics!
A slime recipe you’re supposed to eat!
Spooky Green Slime Cookies
We love slime!! While we make lots of taste-safe slime recipes to play with, you definitely wouldn’t want to eat the whole batch.
That’s why I’m super excited about these bright green slime cookies!
Because you CAN eat them (and they taste delicious!)
These spooky slime cookies are the perfect Halloween party snack for kids OR anytime treat for your little slime fans.
Our bright green Slime Meringues would even be perfect for a slime-themed birthday party with slime gift baskets and slime making activities and decorations!
Related: Check out our Slime Cupcakes made with Jello too!
I’ve included affiliate links for your convenience in re-creating this recipe; disclosure policy here.
Monster Slime Cookies Ingredients
- 4 egg whites
- 1/2 teaspoon cream of tartar
- 1/2 cup granulated sugar
- 3/4 cup powder sugar
- 1 teaspoon vanilla
- leaf green food coloring
- small edible eyes
(makes about 2 dozen cookies)
Kitchen supplies used to make Slime Meringues
- frosting decorating bag with medium round tip
- cookie sheet
- parchment paper or non-stick silicon baking mat
How to Make Halloween Slime Cookies
Keep reading for photo step-by-step instructions and prep tips!
Recipe demo video and free printable copy of our Slime Cookies recipe is available at the bottom of the post.
Preheat oven to 225°F.
Meanwhile, in a standing mixer, combine the egg whites and cream of tartar. Mix until frothy.
Continue to mix on medium-low speed, adding sugar slowly, alternating between the two types of sugar, 1 Tablespoon at a time. Your final Tablespoon should end up being powdered sugar.
Continue to mix until stiff peaks form.
Add food coloring slowly, 1-2 drops at a time, until you achieve your desired shade. It’s easy to add more food coloring, but impossible to make them lighter if you add to much at once!
TIP: We used a piping bag to make our slime meringues, but in a pinch you could use a ziplock bag with the corner cut off.
Note: Don’t forget to save leftover meringue to use later to “glue” your edible eyes to the cookies!
Wait until slime cookies are cool before attaching edible eyeballs with the meringue you kept aside.
Grab a printable copy of this recipe below!
Love slime as much as we do??
Be sure to check out all of our master list of edible slime recipes here!*
*Taste-safe sensory play activities not meant for consumption.
Grab a free printable copy of this Spooky Slime Cookies recipe here:
If you love this slime cookies recipe, rate it!
Spooky Slime Cookies (with VIDEO)
Ingredients
- 4 egg whites
- 1/2 teaspoon cream of tartar
- 1/2 cup granulated sugar
- 3/4 cup powder sugar
- 1 teaspoon vanilla
- leaf green food coloring
- small edible eyes
Instructions
- Preheat oven to 225°F.
- Meanwhile, in a standing mixer, combine the egg whites and cream of tartar. Mix until frothy.
- Continue to mix on medium-low speed, adding sugar slowly, alternating between the two types of sugar, 1 Tablespoon at a time. Your final Tablespoon should end up being powdered sugar.
- Continue to mix until stiff peaks form.
- Add leaf green gel food color, 1-2 drops at a time, until you achieve your desired shade.
- Scoop meringue into the piping bag and pipe dollops of the meringue on top of each other.
- Keep leftover meringue to use later to "glue" your edible eyes to the cookies.
- Bake for 1 hour and 25 minutes at 225°F.
- Once your slime monsters are done baking, remove from oven and allow to cool enough to handle. Use the remaining meringue you set aside earlier to attach edible eyes to the slime cookies.
Video
Notes
Nutrition
Tip: if you don’t have green food coloring on hand, try making these ghost meringues from our friends at Sugar Spice & Glitter!
Be sure to pin our Slime Cookies on Pinterest:
More of our favorite Halloween recipes for kids:
Peanut Butter & Candy Corn Marshmallow Bars
Creamsicle Mini Orange Halloween Cupcakes
Chocolate Spiderweb Halloween Cupcake Toppers
- Chocolate Mint Texas Sheet Cake - December 2, 2022
- Christmas Butter Board - December 1, 2022
- Cranberry Bliss Bread - December 1, 2022
Jessica says
Just curious do these need to be stored in the refrigerator? And how long do they keep? A couple of days? Thank you for the recipe, they are super cute.
Stacey aka the Soccer Mom says
Hi Jessica – they should be fine for about a week or so if keep in an airtight container. If you live in a humid area, you might want to try to use them sooner. Hope this helps!
Rachael says
When does the 1 teaspoon vanilla get added?
Stacey aka the Soccer Mom says
Hi Rachel – You can add the vanilla after you mix the egg whites and cream of tartar. The recipe will taste just fine without it, but I think the vanilla adds a little more depth of flavor. I’ll update the recipe to make it clearer – thanks!
Meghan says
I have two questions:
1) How long does the recipe bake? Inside the instructions it says it bakes for 1 hour and 25 minutes, but at the top of the instructions it says it only bakes 15 minutes.
2) When is the right time to put on the eyes? Your instructions say after they’re done baking, but your video shows before they’re done baking.
Thank you for your help!
Stacey aka the Soccer Mom says
Hi Megan – you can add the eyeballs either before or after baking. The correct baking time is 1 hour and 25 minutes. I must have left off the “1” when I typed up the recipe card, but I fixed it. Thanks for letting me know!
Jessica says
For some reason my stiff peaks aren’t forming?! I followed everything exactly. Does it take awhile?
Stacey aka the Soccer Mom says
Hi Jessica – they won’t be completely “stiff” to the touch, but should hold their shape at least enough to form your cookies on a sheet. Without seeing exactly what you did it’s hard for me to troubleshoot from afar, but I’m happy to try!