You can make safe, realistic fake blood for a costume with simple kitchen ingredients like corn syrup, food coloring, and cocoa powder, and tweak the texture depending on whether you want drips, scabs, or thick gore. Below are a few easy recipes plus safety and stain tips so your costume looks great without creating a huge mess.

Quick Scoop

  • Use corn syrup plus red food coloring for shiny, runny “fresh” blood.
  • Add chocolate syrup or cocoa to deepen the color so it looks less “cartoon red.”
  • Mix in a little cornstarch or flour to make thicker blood that crusts or clots on the skin or fabric.
  • Test everything on an old cloth first because many fake bloods can stain permanently.

Basic Drippy Costume Blood

This one is perfect for quick splatters and drips on clothes or fake wounds, and it’s food-based so it’s safer if it gets near the mouth (but still not meant to be a snack).

Ingredients

  • 1 cup corn syrup (or golden syrup)
  • 2–3 tablespoons water to thin as needed
  • 8–12 drops red food coloring
  • 1 drop blue or green food coloring (optional, to darken the red)

Steps

  1. Add corn syrup to a bowl and stir in 1–2 tablespoons of water until it’s a slow, runny consistency.
  1. Mix in red food coloring a few drops at a time until the color looks like fresh blood rather than pink.
  1. Add a single drop of blue or green to knock down the brightness and make it more realistic.
  1. Test on white paper or tissue; adjust thickness with more water or more syrup.

Best for

  • Fresh-looking cuts and drips on costumes
  • Splattering with a toothbrush or flicking from a spoon for a spray pattern (ideally outside).

Dark, Realistic “Movie” Blood

This recipe uses cocoa or chocolate syrup to create deeper, older-looking blood that reads well in photos and low light.

Ingredients

  • 1 cup corn syrup
  • 2 tablespoons chocolate syrup or 1–2 teaspoons cocoa powder
  • 8–12 drops red food coloring
  • A little water if it’s too thick

Steps

  1. Stir corn syrup and chocolate syrup (or cocoa) together until smooth and evenly brownish-red.
  1. Add red food coloring until the color shifts from brown to a dark blood red.
  1. If using cocoa, blend or whisk well so there are no dry clumps.
  1. Thin with small amounts of water if you want it to flow or leave it thicker for oozing wounds.

Best for

  • Photo shoots or stage where bright red looks too fake.
  • Edges of wounds, dried streaks, or pooled blood.

Thick, Clotted, or “Scab” Blood

For scabbed cuts, crusty edges, or dried blood texture, you want something thicker that sits on the skin and builds height.

Ingredients (skin scab mix)

  • 2 tablespoons cornstarch
  • 1 tablespoon dried onion flakes (optional for chunky texture)
  • 4 teaspoons water
  • 1 teaspoon corn syrup
  • 4–8 drops red food coloring, plus a touch of blue or brown to darken

Steps

  1. Mix cornstarch, onion flakes, water, and corn syrup into a paste.
  1. Add red food coloring and a tiny bit of blue/brown until it looks like dark, dried blood.
  1. Dab or “clump” it onto the skin around fake cuts and let it dry so it firms up like scabs.

Best for

  • Edges of latex wounds or scar wax.
  • Dried streaks under the nose, along the hairline, or around bandages.

Less-Stain / Washable Option

No fake blood is perfectly clean, but some theatre-style recipes are designed to wash out more easily than straight food coloring.

Tips for a more washable mix

  • Use liquid water-based stage colorants or washable food dyes when possible instead of super-concentrated gels.
  • Add a bit of gentle dish soap or baby shampoo to prop blood that’s only going on non-porous props (not eyes or mouth) so it rinses off surfaces more easily.
  • Test your recipe on scrap fabric: paint some on, let it dry, then wash with detergent to see how much staining remains.

Some theatre makers use clear dish soap plus red coloring and a little corn syrup as a “non-stain-ish” blood, but it can still tint light fabrics.

Safety, Skin, and Cleanup Tips

  • Do a patch test on a small area of skin to check for irritation before using anywhere visible or sensitive.
  • Avoid eyes, open wounds, and sensitive areas; even food-safe ingredients can sting or cause reactions.
  • Many recipes can stain skin temporarily; use a barrier like moisturizer or petroleum jelly on the skin first for easier removal.
  • For costumes, assume light fabrics may be permanently stained and either:
    • Use old clothes you don’t mind ruining
    • Spray fake blood on removable accessories (aprons, bandages) instead of the main outfit

Information gathered from public forums or data available on the internet and portrayed here.