In a medium-size mixing bowl, whisk together flour, baking powder, pumpkin pie spice or cinnamon and salt; set aside.
In a large mixing bowl, cream together the butter and sugar. Add vanilla and egg and mix well.
Divide dough in half; shape each portion into a log about 2 inches wide. Wrap logs in aluminum foil and freeze.
To bake, preheat oven to 400 degrees F. Line baking sheet with aluminum foil or parchment paper. Remove logs from freezer. Cookies can be sliced and baked while still frozen; however, they are easier to slice if allowed to stand at room temperature for about 10 minutes.
On a cutting board, use a sharp knife to slice the logs into ¼-thick slices. Place on prepared baking sheet about 2 inches apart. Decorate with seasonal sprinkles, if desired. Bake at 400 degrees for 10 to 12 minutes. Makes about 3 dozen.
Recipe by Jolene Ketzenberger.