Blend together:
1 cup butter (salted)
1 cup granulated sugar
1 egg
1 teaspoon vanilla
Mix together
3 cups sifted flour
1/4 teaspoon salt
1 teaspoon baking powder
Gradually add dry ingredients to moist ingredients, forming dough ball.
Chill dough for ½ hour (covered).
Roll dough to desired thickness and cut cookies.
Bake at 375 F for 8-10 minutes.
Cool on rack.
Frosting
1 box (16 ounces) confectioners sugar (10x)
1 cup (2 sticks) salted butter
1 teaspoon vanilla
Add milk to desired consistency
Frost cookies when cool, and then add red/green sugar sprinkles.