Description
These Glow-in-the-Dark Halloween Sugar Cookie Cutouts are soft, buttery, and glow under black light thanks to tonic water! A magical Halloween treat that’s spooky, fun, and perfect for parties or baking with kids.
Ingredients
- 2 ¾ cups all-purpose flour
- 1 tsp baking powder
- ½ tsp salt
- 1 cup unsalted butter, room temperature
- 1 cup granulated sugar
- 1 large egg
- 2 tsp vanilla extract
- 1 tbsp tonic water (contains quinine – glows under black light)
- 2 cups powdered sugar
- 2 tbsp tonic water
- 1 tbsp light corn syrup
- Food coloring (neon green, purple, orange work best)
- Optional: Edible glitter or glow sprinkles
Instructions
- In a medium bowl, whisk together flour, baking powder, and salt.
- In a large bowl, cream butter and sugar until fluffy (2–3 minutes).
- Beat in egg, vanilla, and tonic water.
- Gradually mix in dry ingredients until soft dough forms. If sticky, add a little flour.
- Divide dough into two discs, wrap in plastic, and chill for at least 1 hour.
- Preheat oven to 350°F (175°C). Line baking sheets with parchment.
- Roll one dough disc to ¼-inch thick on a floured surface. Cut Halloween shapes and transfer to baking sheet.
- Bake for 8–10 minutes until edges just start to turn golden. Cool on sheet for 2 minutes, then transfer to wire rack.
- For icing, whisk powdered sugar with tonic water and corn syrup. Adjust consistency as needed.
- Color icing as desired and decorate cooled cookies. Let icing set for 1 hour.
- Turn on a black light to see the eerie glow!
Notes
Tonic water contains quinine, which glows under black light—perfect for spooky cookies! Chill dough for best shape retention. Let icing dry completely before stacking. Use neon colors for best visual pop under UV light.
- Prep Time: 25 minutes
- Cook Time: 10 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American