Preheat the oven to 350°F (175°C). Spray a mini muffin tin with non-stick cooking spray.
Roll cookie dough into 1-inch balls and place one in each muffin cup.
Use your thumb or a small spoon to press a well into the center of each dough ball.
Bake for 10–12 minutes or until lightly golden.
Remove from the oven and gently press down the centers again with a spoon.
Let the cookie cups cool in the tin for 10 minutes, then transfer to a wire rack to cool completely.
In a microwave-safe bowl, melt the chocolate chips in 30-second intervals, stirring between each until smooth.
Spoon the melted chocolate into the wells of each cookie cup.
Melt the candy melts (or white chocolate + green coloring) and spoon or pipe a small amount over the chocolate layer.
Decorate with sprinkles, mini marshmallows, candy eyes, and candy pearls.
Cut licorice ropes and insert both ends into the cookie cups to form handles, mimicking a cauldron.
Let set until firm before serving.