Mix softened cream cheese, softened butter, peppermint extract, and crushed oreo cookies in a large bowl.
Add 1 cup of powdered sugar and mix well to form a dough.
Scoop up 1/2 inch balls of the mixture and place them on a baking sheet lined with parchment paper or wax paper.
Press down each mint with a fork.
Place the mints in the fridge for at least one hour. The mints should be hard when they are ready to eat. Keep the mints in the fridge right before serving.