Preheat the oven to 350 F. In a large bowl, combine butter and powdered sugar until fluffy. Add in peppermint extract and mix until smooth.
Add in flour and mix until it is fully combined. Fold in the Christmas sprinkles. Roll the cookie dough into balls, and flatten each slightly.
Place the cookies onto a large ungreased baking sheet. Bake for 10-12 minutes.