In a large bowl, cream butter and sugar well

Beat in eggs and vanilla

In a separate bowl, mix together flour, baking powder, and salt

Gradually blend the dry mixture (second bowl) into the wet ingredients (first bowl)

Chill dough for at least three hours or overnight

Roll dough out on a heavily floured canvas with a rolling pin until 1/8 - 1/4 thickness

Cut out with cookie cutters

Bake at 350°F until lightly golden