In your electric mixer, beat the butter until smooth and creamy. (about 1 minute). Add in sugar and beat until smooth. (about 2 minutes). Add vanilla. Stir in the flour and salt until incorporated. Flatten the dough into a disk shape. Wrap in plastic wrap, and refrigerate for at least an hour or until firm.

Preheat oven to 350 degrees. Line two baking sheets with parchment paper.

On a lightly floured surface roll out the dough into a 1/4" thick circle. Cut into rounds or other shapes using a floured cookie cutter. Place on baking sheets and refrigerate for about 15 minutes. Cookies will keep their shape much better.

Bake for 8 - 10 minutes, or until cookies are very lightly browned. Cool on rack.

Melt Chocolate and dip half of the cookie, place on a parchment lined cookie sheet and refrigerate for 15 minutes to harden chocolate. Dust with sprinkles if desired.