* Both of these ideas are all over the internet, and I found out about them when my color-changing martini appeared on various "Creepy Halloween Foods" lists (dabbled, neatorama, mentalfloss, etc). I concede that it does have a certain mad scientist vibe to it, but it's hardly gross or scary!
Step 1: Ingredients
Gin (6 parts)
Vermouth (1 part)
For the bloody eyeball cocktail:
Vodka (2 parts)
Triple sec (or any orange liquer, e.g. Cointreau, Grand Marnier; 1 part)
Lime juice (1 part)
Cranberry juice (2 parts)
Lychees, canned and peeled in a can
Cranberries (fresh or dried)
Dry ice is optional for both, but makes for a great creepy effect - and of course very effectively chills the drink.
Step 2: Zombie Eyeball Martini
The original (?) recipe calls for making the eyeballs the day before, chopping off the root and freezing them into ice cubes overnight, but I imagine a frozen eyeball is harder to snack on. I recommend just making them fresh - their structural integrity is good, and it's easy to pull the eyeball out of the glass by the optic nerve and munch noisily on it.
Step 3: Bloody Eyeball Cocktail
Stuff the cavity of a peeled lychee (from a can) with cranberries, as many as it takes to have them slightly protruding. Pop in a martini glass,and add triple sec (or any orange liqueur - we used Grand Marnier), then lime juice, and vodka (1:1:2) and top up with cranberry juice. Add a chunk of dry ice and serve (again, make sure the drinker knows to wait until the smoking stops before consuming). If you have no dry ice, mix the ingredients (but not the eyeball!) in a cocktail shaker with ice, shake then strain into the glass over the eyeball.