How To Make Authentic Horror Movie Blood

BBC presenter Mark Gatiss, host of a series called A History of Horror, mixes up a goop called Kensington Gore, is just the type of hyperbolic hemoglobin that helps your costume cross over into creepy territory. Here's the ingredient list:

2 cups of Golden Syrup
1 cup of Water
10 teaspoons of Red food colouring
A few drops of Blue food colouring
A few drops of Yellow food colouring
10 tablespoons of Corn Flour
Mint flavouring—to taste