How Can I Thicken This Blood?

[🪦 FeAr HiMsElF ●]

Just mixed a cup of caro syrup with with a tablespoon of red & 2 drops of green food coloring...looks good, but I\'d still like it a little thicker, less runny.  Oh yeah, and how hard is the food colored blood to wash off?

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My friend threw some of the blood we made on a pair of old jeans and left it for a couple days. It all washed off in the washing machine.