
If you’re familiar with the Ghostbusters movies, you know about ectoplasm and ghosts. It’s the viscous supernatural goo associated with spirits manifesting in the living world. Unless you have a pet poltergeist, you’ll need to make your own ectoplasm for haunted houses and ghoul costumes. Fortunately, all it takes is a simple twist on an edible slime recipe to make the stuff:
Ectoplasm Slime Ingredients
- 1 cup (8 ounces) water
- 1 teaspoon soluble fiber (e.g., Metamucil)
- food coloring (optional)
Fiber comes in both flavored and unflavored versions. Some of these products also contain color. The ectoplasm in the photo was made using orange Metamucil, with a drop of neon green food coloring. The unflavored version produces a translucent uncolored slime.
Let’s Make Ectoplasm!
Making ectoplasm slime is easy:

- In a microwave-safe bowl, stir together the fiber and water.
- Microwave the mixture on high power for 3 minutes.
- Stir your ectoplasm and then heat it on high for another 3 minutes.
- Check the consistency of the slime. If it is too liquid-y, microwave it for another minute, check it, and then either call it good or continue cooking for 1-3 minutes until you get the consistency you want.
- Add a drop or two of food coloring. You can mix in the color completely, or not, depending on the desired appearance.
- If you aren’t using the ectoplasm right away, it can be stored in a sealed bag or container in the refrigerator up to a week before use. It will last even longer for decorating purposes, though I wouldn’t want to eat it past that point.
Tips
Make the ectoplasm slime glow in the dark by stirring in a bit of glow paint. Substitute ink from a fluorescent highlighter pen in place of water for a slime that glows under a black light. These variations are way cool, but not edible, so they should only use them on surfaces or dripping from clothes, not around your eyes or mouth.

