Directions

1. Heat oven to 325°F. Spray bottom only of 9-inch pie plate with cooking spray.
2. In large bowl, mix cookie mix, 1/2 cup softened butter and egg with spoon until soft dough forms. Stir in candy sprinkles. Press dough in bottom of pie plate.
3. Bake 33 to 38 minutes or until center is set and edges are golden brown. If needed, cover edges of cookie with foil to keep from overbrowning. Cool completely, about 1 1/2 hours.
4. In medium bowl, beat powdered sugar, 3 tablespoons softened butter, the vanilla and 3 teaspoons of the milk with electric mixer on low speed until smooth and creamy. If necessary, add additional milk to make frosting easy to spread.
5. Spread frosting over cookie pie. Decorate top of frosted cookie as desired with assorted holiday candies. To serve, cut into wedges.