I'm a fan of FX make-up, so when I checked Instructables for easy blood I found that they called for chocolate syrup. So I came up with this easy version.
Step 1: Materials
Blackstrap molasses, red food coloring, cup to mix it in, make-up for the edges of your wound
Mix food coloring with molasses to desired color
Apply make up where you would like the wound to be. I used a cheap eye shadow pencil and smeared it.
Fill in the wound with blood mixture. That's it. You can dry it some with a blow drier, to add more layers. The make up will remain somewhat sticky much like a true wound.