Preheat the oven to 200 degrees Fahrenheit and line a baking sheet with parchment paper.
Place the egg whites and cream of tartar in a clean mixing bowl. Beat on medium speed until soft peaks form.
Add the sugar a little at a time while beating on high speed. Continue until the mixture reaches stiff, glossy peaks.
Mix in the vanilla extract and enough green food coloring gel to reach a bright green shade.
Spoon the meringue into a piping bag fitted with a star tip. Pipe small kiss shapes onto the prepared baking sheet.
Press two mini chocolate chips into each meringue to create eyes.
Bake for 1 hour and 30 minutes, then turn off the oven and leave the meringues inside to cool completely.