Delicious fake blood?

Does anyone know a good recipe for fake blood that doesn’t taste bad?

I tried using cocoa powder, corn syrup, food coloring and grenadine but it was pretty gross.

It’s actually for a Bioshock costume so it’s supposed to be ADAM not blood but it looks similar:
http://farm4.static.flickr.com/3099/…0e9ceb8ec7.jpg

I guess that is a little less opaque than blood.

Originally posted 2013-11-05 06:50:00. Updated!