In the bowl of a stand mixer fitted with a paddle attachment, cream together the cream cheese and mint extract.
Add 2 cups of powdered sugar and the milk. Mix until smooth and creamy.
Add the remaining powdered sugar and stir on low until combined.
Fold in 2 tablespoons of sprinkles, but be careful not to over mix - the sprinkles tend to bleed their colors.
Roll the mixture into small balls, if the dough is sticky, try refrigerating it for 10 minutes or dust your hands with powdered sugar.
Pour the remaining sprinkles onto a small plate and roll the balls to coat them.
Place the balls onto a parchment paper lined baking sheet and refrigerate for 30 minutes.
Press each ball flat using the tines of a fork. Aim for about 1/4 inch thickness.
Let the mints dry on the counter for about an hour, then store them in an airtight container in the refrigerator for up to a week or freeze them for months of minty goodness.