- Preheat the oven to 350 degrees. Grease cookie sheets or line with parchment paper.
- Mix butter, sugar, and vanilla on medium speed.
- Turn mixer to low speed and slowly add in the salt and flour a little at a time. Mix until combined, but not too much.
- Roll tablespoon-sized pieces of dough into balls and place on prepared cookie sheets.
- Grease the bottom of a glass and press each ball into a round cookie.
- Bake for about 15 minutes, checking to make sure they aren’t burning. Cookies should be golden brown around the edges.
- Leave on cookie sheets a few minutes to cool, then transfer to racks.