1. Preheat oven to 200°F (90°C) and line a baking sheet with parchment paper.

2. In a clean bowl, beat egg whites on medium speed until soft peaks form.

3. Gradually add sugar while continuing to beat on high speed until stiff, glossy peaks form; then mix in vanilla extract.

4. Transfer mixture to a piping bag and pipe ghost shapes onto the prepared baking sheet.

5. Bake for 1 hour 30 minutes until the meringues are dry and crisp, then turn off the oven and let them cool inside.

6. Once cooled, press mini chocolate chips or use black gel to create eyes and mouths on each ghost.