Want to learn how to make fake snot so realistic it’ll make everyone in the room recoil? Read on for this delightfully gross booger recipe and put it to work on your favorite unsuspecting victims. The magic behind homemade fake snot comes down to two simple compounds – glue and borax – plus a little food coloring to nail that sickly green-yellow hue. It’s cheap, it’s fast, and when you drape a glistening string of it off your fingertip, it looks exactly like the real thing dredged up from a bad head cold. Grab your supplies below and let’s get slimy.
How To Make Fake Snot: Supplies
To whip up this dastardly, disgustingly convincing mess, you’ll need just a handful of ingredients and utensils. Here’s the full list.
Elmer’s Glue
The first ingredient is glue. Elmer’s brand is washable, safe, and non-toxic. It’s made from a rubbery synthetic polymer called PVA (polyvinyl acetate). Here’s a handy tip: white glue gives you thick, opaque boogers, while clear glue produces a more translucent, wet-looking snot. Pick your poison based on the effect you’re after.
Borax
The second ingredient is borax, a laundry booster and cleaner. It’s the “activator” that reacts with the glue to turn runny liquid into stretchy slime. Borax can irritate skin and shouldn’t be swallowed, so wear gloves if your hands are sensitive, keep it away from little kids and pets, and always wash up afterward.
Green Food Coloring
This is what gives your boogers their unmistakable greenness. Use more or less depending on how sickly you want your mucus to look. For that extra convincing, under-the-weather touch, add a single drop of yellow food coloring to push it toward a phlegmy green-yellow.
Plastic Bags
A zip-top plastic bag holds your slimy mess and lets you smoosh and mix everything together without coating your hands. Bonus: you can store the finished snot right in the same bag.
Other things you’ll need: a spoon, water, and a cup.
Make Fake Snot Recipe: Step By Step
Here’s how to bring your boogers to life. Follow the numbered steps in order.
Step 1: Combine about 1/8 cup of borax with half a liter of warm water (a little over 2 cups) inside the plastic bag. Swish it around to dissolve as much borax as you can. It doesn’t need to dissolve completely – this is your activator solution.
Step 2: In your cup, mix about two large spoonfuls of glue with three large spoonfuls of water. Add a couple drops of green food coloring (and one drop of yellow if you want that phlegmy tint) now, and stir it all together.
Step 3: Pour the colored glue mixture from the cup into the plastic bag holding the borax water. For that authentic streaky, stringy booger texture, drizzle in one more teaspoon of the borax solution right after.
Step 4: Seal the bag and squish, fold, and mix everything together. Watch the runny liquid transform into stretchy, glistening mucus. Pull it out, give it a stretch, and admire your revolting handiwork.
Caution: Borax is relatively low-toxicity but is not for eating, and it can irritate skin and eyes. Keep it away from young children and pets, wear gloves if needed, and always WASH YOUR HANDS after playing with this snot. The good news is the finished slime is washable and non-staining, so it wipes off skin, tables, and most fabrics with warm water.
Fake Snot Prank Ideas & Variations
Once you’ve got a good batch, the pranks practically write themselves. Fake a monster sneeze into your hand and then “wipe” it on a friend’s arm. Drape a long, dangling string from your nostril and walk into the room like nothing’s wrong. Smear a glob onto a doorknob, a phone screen, or the underside of a desk for a surprise nobody wants to find.
Want to mix it up? Try these variations:
- Clear “wet” snot: use clear glue and skip most of the coloring for that fresh-runny-nose look.
- Thick crusty booger: use white glue and add extra activator so it firms up into a rubbery lump.
- Sick-day green-yellow: combine green plus a drop of yellow for the classic head-cold hue.
This recipe is basically a cousin of homemade slime, so once you’ve mastered it you’re halfway to a dozen other gross-outs. Keep the momentum going with our recipe for edible fake poop, whip up a batch of fake vomit for maximum realism, or add some edible fake blood to build a full-blown horror scene. Shipping your creation to a deserving target? Our guide to prank boxes has you covered.
Frequently Asked Questions
Is homemade fake snot safe and non-toxic?
The finished slime is made from washable PVA glue and is safe to handle and non-staining. The one ingredient to respect is borax, which shouldn’t be eaten and can irritate skin. Keep it away from small children and pets, and wash your hands after playing with it.
How do I get the most realistic snot color?
Start with just a drop or two of green food coloring and add a single drop of yellow. That green-yellow blend reads as sickly mucus, while too much green tips it into obvious craft slime. Clear glue gives you a wetter, more translucent look than white glue.
Can I make fake snot without borax?
Yes. You can swap borax for a saline-solution-and-baking-soda activator, which is gentler on skin, though the texture will be a bit softer. The borax version gives you that stringiest, most convincing booger stretch, which is why we use it here.