In large mixing bowl, combine butter, sugar, eggs and vanilla; using an electric mixer on medium speed, beat until light and fluffy.
Reduce mixer to low; add flour and salt, mixing until well combined, scraping bowl often.
Place dough into cookie press with desired design. Press out shapes 1-inch apart onto ungreased baking sheet. Sprinkle with colored sugars, if desired.
Bake in a preheated 400°F oven 5-8 minutes or until edges are lightly browned.