Mix together pie crust mix, powdered sugar, sour cream (or milk), egg, and vanilla
Refrigerate the dough while preheating oven to 350°F
Roll out the dough
Cut out cookies with a punch or cookie cutter
Optional: add sprinkles before baking or powdered sugar icing after baking
Bake at 350°F for 8 to 10 minutes
Cool and serve
