Fill the cocktail shaker halfway with ice cubes to chill the mixture.
Add the green apple liqueur, vodka, fresh lemon juice, and edible shimmer powder to the shaker.
Secure the lid on the shaker and shake vigorously for about 15 seconds until the mixture is well chilled and slightly frothy.
Remove the lid and strain the mixture into a chilled martini glass, allowing the shimmering liquid to flow smoothly.
Garnish with a small slice of green apple or a spooky garnish as desired.
Serve immediately and enjoy the luminous, refreshing sip with a haunting twist.