You could go the route of Regina George and her minions and dress up like a completely slutty bunny, mouse or cat this Halloween — or you can put on your big girl pants and do yourself up like a legit zombie bride/ex-wife like Cady Heron did. And since we're on a mission to bring back creepy costumes, we're gonna help you scare all your friends with some DIY fake blood for your costume that looks, like, way too real.

Image: Heather Barnett/SheKnows

Making Hollywood-style fake blood is easier than you think, and it can be done with ingredients you probably already have around the house. If you've got flour, food coloring and some corn syrup, you're about 10 minutes away from homemade ghoulish fun.

More: 21 Hilarious Group & Trio Halloween Costume Ideas

Hollywood-style fake blood recipe

Yields about 2 tablespoons

What you'll need:

  • 1/2 teaspoon red food coloring
  • 1 tiny drop blue food coloring
  • 1 tiny drop green food coloring (optional)
  • 1 scant teaspoon flour, sifted
  • 1 tablespoon corn syrup
  • 1 small shallow glass or plastic bowl
  • 1 toothpick
  • Cooking spray
  • Water (optional)
  • Chocolate sauce (optional)
  • Liquid laundry soap (optional) 

Directions:

  1. Add flour and red food coloring to the mixing bowl.
  2. Spritz your tablespoon with cooking spray and use it to add corn syrup to the mix.
  3. Use the toothpick to add the tiniest drop of blue food coloring. You can always add more. Add the same amount of green food coloring if you need it to be more purple. Stir with a small whisk or spoon until well blended (and not lumpy).
  4. Adjust the recipe using additional food coloring, chocolate sauce, water or laundry detergent (see below) as needed.

Image: Heather Barnett/SheKnows

It's obvious why you need the syrup and red food coloring, but using those ingredients alone will produce the same fake-looking goop you buy in the Halloween aisle. To properly adjust your mix, it's important to understand the effects the other ingredients have on your fake blood so you know how to adjust the recipe to your unique needs. For the best results, try making some ahead of time so you can experiment.

Next Up: Understanding the ingredients

Originally published October 2012. Updated October 2017.

Image: Heather Barnett/SheKnows

Cooking spray

The cooking spray simply acts to prevent the corn syrup from sticking to the tablespoon. The fat prevents the syrup from adhering to the plastic or metal surface. In a pinch, you could also use butter, shortening or even regular cooking oil. Just make sure it's a light coating so you don't add too much oil to the mix.

More: 118 Feminist Halloween Costumes — Because a Sexy Nurse Is so Last Century

Blue and green food coloring

The blue and green food coloring help darken the red so it doesn't have that bright, fake look. If your blood is too bright, you can add more. Start with just the blue and add green, as well, if you need a more "purple" look.

You want lighter blood for "fresh wounds" and darker blood for those that would have been there longer. Just add the blue or green food coloring, one very tiny drop at a time (a little goes a long way... it's just an accent color). Remember, arterial blood is bright red and veinous blood is dark (almost maroon).

Flour

Flour is a thickener. Don't use extra corn syrup to thicken, as it gives the blood a strange, almost sticky (syrupy) look. If you don't have flour, you can add a bit of cornstarch, as well, but use less. (You can also use chocolate sauce; see below.) 

Glass or plastic bowl

Be careful what container you use for the mix. Red food coloring stains, especially if it's left in the container for too long. Use one you don't care about. If you tend to like creepier costumes, just mark it "fake blood" and tuck it away with your Halloween decorations.

Water & chocolate sauce

Water and chocolate sauce can be used to adjust the thickness of the blood. Water will thin it, while the chocolate will thicken. Only use the chocolate if your blood can stand to be a bit darker. Otherwise, stick with flour or cornstarch.

Liquid laundry detergent

Adding laundry detergent to the mix is said to make it easier to get it out of clothing. But beware. It may not work on all clothes. Also, you shouldn't use it for blood that's going to be on kids or blood that goes too near your mouth or fingers, as you're likely to ingest some (and even if it's not poisonous in small amounts, it tastes revolting!). Skip this step if you need to keep it fully edible.

Image: Heather Barnett/SheKnows