Preheat oven, cream butter and sugar, add flour and salt, press dough into bottom of greased tart pan, refrigerate for 30 minutes, cut into wedges and poke with fork.
Bake at 300 for 1 hour or until golden brown
1 cup salted butter, softened
3/4 cup confectioner's sugar
1 teaspoon salt
2 cups all-purpose flour