Line a baking sheet with parchment paper and set aside. 

Add the marshmallows and butter in a microwave safe bowl. 

Microwave on high in 30 seconds intervals until melted. 

Add the green food coloring and vanilla extract and stir until combined. 

Add the cornflakes and gently stir to coat. 

Place ¼ cup of mixture on the prepared baking sheet. 

Coat your hands with cooking spray. 

Form the mixture into wreath. 

Decorate with red candies.

Refrigerate for minimum 2 hours or until set.