In a medium mixing bowl stir together flour, salt, baking soda, pepper, aniseeds, cinnamon, allspice, nutmeg, and cloves, set aside.
In a large mixing bowl with an electric mixer on medium speed cream butter, sugar, and molasses until fluffy. Beat in egg. On low speed gradually add flour mixture and beat just until blended. Cover and chill dough for at least 1 hour.
Preheat oven to 350 degrees and grease baking sheets. Roll dough into 1 1/2 inch sized balls. Place balls two inches apart onto prepared baking sheets. Bake for 12 to 14 minutes.
When cookies are cool enough to handle, but still warm roll in powdered sugar. Transfer cookies to cooling racks to cool completley.