The glow in this Halloween punch isn’t a photography trick. It naturally comes from the bitter alkaloid quinine, which also gives tonic water its characteristic bitterness. Because the quinine in the tonic is UV reactive, it will glow an eerie (but edible!) blue when exposed to a standard black light. But it does take a good amount of tonic to get a nice bright glow: Our test kitchen found that tonic water had to make up at least 50 percent of the volume in the recipe. To balance that bitterness, we mixed it with sweeter pineapple juice, Cointreau, pisco, and lime juice, in a riff on Pisco Punch. And in a Martha-inspired moment, we also created glowing “severed hands” by freezing tonic water in latex gloves to give the punch an extra-creepy look and keep it cold. Make sure to place the punch bowl right underneath a couple of black lights to get the maximum luminescence.
What to buy: Pisco is a brandy distilled from South American white Muscat grapes. It can be found at well-stocked liquor stores or online.
Special equipment: You will need 2 medium or large powder-free latex gloves and 2 rubber bands to make the glowing hands.
To get the glowing effect, you will need a few black lights.
Game plan: To quickly flatten the tonic water for the severed-hand ice cubes, place it in a container and agitate until bubbly. Repeat several times until almost no bubbles remain. Alternatively, pour it into a container, loosely cover, and let sit overnight at room temperature.
The severed hands will need to freeze overnight, so be sure to make them at least 1 day before you plan to serve the punch.
For the punch:
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