Fake Blood

Fake Blood Science Experiment – Steve Spangler Science

Here are amazing fake-blood recipes you can use for Halloween, for pranking, or for first aid training.

How to Make Fake Blood Science Experiment 

Wondering how to make edible fake blood? Want to know how to make fake blood with food coloring? You’ll really be able to gross out your friends and your family with our Fake Blood Science Experiment from Steve Spangler Science. Quickly and easily make fake blood with our amazing and gross fake blood recipes you can use for Halloween, for pranking friends and family or for first-aid training.

A few gallons of easy-to-make fake blood are just the ticket for your Halloween haunted house, for some innocent pranks or for emergency preparedness training. The main problem is that there are a lot of fake blood recipes out there. The biggest complaint is that fake blood looks nothing like real blood — until now, that is! Steve Spangler Science uses some experimentation to make several very realistic batches of fake blood with food coloring — and even edible fake blood. Ew! 

Experiment Materials

  • 16 oz (454 gm) Powdered sugar (You’ll have great results using Imperial Sugar or Dixie Crystals brands.)
  • 1 oz (30 ml) Red food coloring
  • 1 T Cocoa powder
  • 8 oz (237 ml) Water
  • Food blender
  • Paper towels
  • Measuring spoons
  • Spoon or spatula
  • Clean, old t-shirt or fabric
  • Adult supervision

Experiment Videos


Perfect Fake Blood - Easiest Recipe Ever Step 1


Even though it stains whatever it touches, this is, hands down, the BEST and the easiest to make fake-blood recipe. The secret is the combination of Imperial powdered sugar and cocoa powder. The addition of red food coloring means this the sickest blender-blood you can make! (And that’s a good thing, too.)

Pour the water into the blender.

Perfect Fake Blood - Easiest Recipe Ever Step 2


Add the box of powdered sugar (yes, a whole box) to the blender. Put the lid on the blender and blend the mixture on a lower speed. You may need to turn the blender on and then off a few times to make sure it blends together well.

Perfect Fake Blood - Easiest Recipe Ever Step 3


Add the red food coloring to the mixture. One ounce (30 ml) will likely be the whole bottle, too.  Blend the mixture and make sure it blends completely. You may need a spatula to scrape the blender walls.

Perfect Fake Blood - Easiest Recipe Ever Step 4


Add the tablespoon of cocoa powder. Blend it again and, you guessed it, make sure it blends completely.

Perfect Fake Blood - Easiest Recipe Ever Step 5


Use a spoon to get some of your fake blood for a test. Drip it and spread it on a cloth, a paper towel, or on your hand. Too cool, Dr. Frankenstein!

This version of fake blood is completely edible (and actually tastes pretty good). However: because you’re using food coloring, this blood recipe will stain anything it touches. Be careful! (But have fun, too.)

How Does It Work

The fake blood recipes included here are designed to provide you with ideas to make up your own recipe based on your needs. Most of them require ingredients found at a grocery store, making the fake blood final product completely edible. (That’s just in case you need a little dribble of blood coming out of your mouth!)

How to Make Fake Blood: The Easiest, Very Best Method

Believe it or not, the secret tool for making the very best fake blood is a kitchen blender. Blending the ingredients saves time and helps cut down on the overall mess of making fake blood. When you’re mixing a batch, it’s important to remember that what you see in the blender is not what the product will look like on your skin or dripped onto a piece of fabric. Real blood is not just red, it’s reddish brown. Real blood is also not transparent; instead, it has an opaque quality that you’ll need to duplicate in your recipe.

One final word of caution: Making fake blood is a blast but it can be very, very messy. Also, since the main color agent is food coloring, fake blood recipes will stain anything and everything! Your hands will be a red mess at the end of your ghoulish mixing session, but don’t worry. A batch of OxiClean® will wash your hands, your clothes and your friends’ clothes.

Take It Further

Fake Blood Recipes with Food Coloring 

Corn Syrup Fake Blood

This is one of the most common recipes you’ll find. You’ll see that it doesn’t really look anything like blood, though. That’s fine. Go ahead and make the batch because you’ll use the ingredients a little later on anyway. They all kind of build on each other.

  • 1 cup (237 ml) light or dark corn syrup
  • 1 tablespoon (15 ml) water
  • 2 tablespoons (30 ml) of red food coloring
  • A few drops of green food coloring

Combine all of these ingredients in the blender for a few seconds. You can adjust the amount of green food coloring to make the blood a little more brownish red in color. However, you’ll notice that this fake blood is a little too transparent.

Take the paper towel or fabric test: drip a few drops of blood onto a towel to see how realistic it looks to you.

Realistic-Looking Fake Blood Recipe: The Cornstarch Secret

Cornstarch is a common thickening agent for gravies, pie fillings and other goodies. It’s also a great ingredient for fake blood because it adds a little opacity (a fancy word meaning that you can’t see through it) to the liquid.

Use the mixture from the corn syrup recipe above; then, add two tablespoons of cornstarch.

Place all of the ingredients in the blender and mix until the cornstarch dissolves. If the solution is too thick, add a tablespoon of water and blend the ingredients. Keep doing this until the blood is the consistency you need.

Take the paper towel or fabric test: drip a few drops of blood onto a towel to see how realistic it looks to you.

Even More Realistic-Looking Fake Blood Recipe: The Chocolate Syrup Secret

In the days of black and white TV shows and movies, chocolate syrup was the perfect solution to the fake blood-making problem. On a black and white screen, chocolate syrup looked and behaved just like real blood. Even though times have changed, chocolate syrup can still be an important ingredient in making great edible fake blood.

  • 1 cup (237 ml) corn syrup (clear or dark)
  • 2 tablespoons (30 ml) water
  • 2 tablespoons (30 ml) of red food coloring
  • 1 tablespoon (15 ml) chocolate syrup
  • 2 tablespoons cornstarch

Mix all of the ingredients in the blender for a few seconds. Watch as the fake blood oozes down the inside wall of the blender to get a good idea of what it will look like on the white towel. Each of the ingredients in this recipe adds its own special quality to the fake blood: thickness, color, and opacity.

Take the paper towel or fabric test by dripping a few drops of blood onto a towel to see how realistic it looks to you.

Tropical Fake Blood Recipe

This recipe combines everything you’ve learned so far about making fake blood and adds a few ingredients that pack a great punch (pun fully intended, as you’ll see).

  • 1/2 cup (118 ml) tropical fruit punch (Hawaiian Fruit Punch® works great)
  • 1 cup (237 ml) corn syrup
  • 2 tablespoons (30 ml) of red food coloring
  • 1 tablespoon (30 ml) of chocolate syrup
  • 2 tablespoons of cornstarch
  • 1 tablespoon of powdered cocoa

Combine all of the ingredients in the blender and mix for 10 seconds. Since different brands of fruit punch vary in color, you’ll need to use your vast fake blood-making experience to tweak the recipe to get the perfect batch.

Some fake blood connoisseurs recommend adding a cup of coffee to the fake blood concoction, instead of the fruit punch. If you add coffee, you may need to reduce (or eliminate) the amount of chocolate syrup and powdered cocoa used in the recipe. Remember, it’s all about the experimentation!

Take the paper towel or fabric test: drip a few drops of blood onto a towel to see how realistic it looks to you. Or better yet — roll up your sleeve, drip some on your arm and then run to a neighbor!

Safety Information

Since all of the ingredients you use in your fake blood recipes are edible, you’ll be OK if you have red teeth or a wound in your mouth. It won’t taste all that great but it’s not poisonous.

As far as storing any clean, unused leftovers, think of your concoction like an edible paint. Use a glass container with a screw-on, airtight lid. Rinse and dry the lid and the threads on the container before screwing on the lid for storage. Keep the jar upright in a location out of direct sunlight. Refrigeration is not necessary — a cool, dark location is preferred. It’s best not to try and salvage used fake blood for long-term storage. Just mix more and have fun doing it!

WARNING! You DO have to watch out for staining! Old shirts and rags are one thing, but the living room carpet and mom’s new blouse are entirely another. Be very smart when it comes to applying your newest scientific achievement.

Steve Spangler Science Online Science Experiments

Did you have fun learning how to make fake blood? Did learning how to make fake edible gross someone out? There are more experiments on Steve Spangler Science that will wow, gross out and amaze your friends and family. Be sure to check out our HUGE online experiment library to find the best and coolest science experiments for kids. They’re also great to use as awesome science fair experiments. Visit the top five science experiments on our website, check out our all-in-one science kits or stock up on some lab supplies while you’re here. Our extensive collection has everything you need to keep those science experiments coming fast and furious!

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