In a large mixing bowl (or stand mixer fitted with a paddle attachment) beat together the butter, sugar, and salt. Mix until light and fluffy, about 1-2 minutes.
Add the eggs one at a time, beating between each addition, then add the vanilla.
Slowly add the flour with the mixer on low speed, mixing until well incorporated.
Use a rubber spatula to transfer the cookie dough to a cookie press fitted with the desired disk. Press the dough out onto an ungreased baking sheet. (No silicone mats or parchment paper!) Add sprinkles before baking if desired.
Bake for 6 to 8 minutes or until the cookies are barely golden brown around the edges.
Remove from the oven and cool completely on a wire rack.
Notes
If you don't have salted butter, increase the total amount of salt in the cookies to 1 teaspoon and use unsalted butter.
Change the flavor of your cookies with fun flavor extracts like orange or almond.
You can skip the sprinkles and dip the tops of the cooled cookies into icing or chocolate if desired.