Preheat the oven to 350°F (175°C).

In a large bowl, cream together the softened butter and granulated sugar until light and fluffy.

Beat in the egg and vanilla extract until well combined.

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

Gradually mix the dry ingredients into the wet ingredients until just combined.

Spoon the dough into a cookie press and shape onto ungreased baking sheets.

Bake for 10-12 minutes, or until the edges are lightly golden.

Remove from the oven and let the cookies cool on the baking sheet for a few minutes before transferring to wire racks.

Once completely cooled, decorate with icing and sprinkles if desired.