Position a rack in the middle of the oven. Preheat the oven to 375º F. Line a cookie sheet with parchment paper or silicone baking mat.
Combine the flour and salt. Set aside.
In the bowl of an electric mixer combine the sugar and butter. Beat on low speed with the paddle until well mixed. Increase the speed to medium and continue beating until light, about 2 minutes. Beat in vanilla seeds.
On low speed with the dough hook, add the flour mixture, mixing until just incorporated. If the dough looks grainy, don't worry, turn off the mixer and knead slightly until uniform and smooth (like clay).
Form 12 tablespoon sized balls and flatten. I used a cookie stamp to flatten them.
Place them in the cookie sheet and bake for 10-12 minutes or until the bottom is lightly browned.
Cool on the pan for 2-3 minutes, before transferring to a wire rack to cool completely.