Cream the butter, the sugar, and the salt together. Scrape down the sides of the bowl and beat in the vanilla.
Fold in the flour and gently mix until a soft dough forms. It will be moist and crumbly.
Turn the dough out onto a piece of parchment paper and bring together with your hands. Pat into a disk shape and smooth the top and edges. Place another piece of parchment paper (or plastic wrap if you find that easier) on top and roll out the dough to about 1/3" thick.
Cover with plastic and refrigerate the rolled out dough for 1 hour.
Preheat oven to 350F
Remove the dough from the fridge and cup out into 2" rounds. Place on a fresh parchment lined baking sheet, about 1-2 inches apart. If you like you can prick the surface of the cookies with the tines of a fork for a classic shortbread appearance, but it's not necessary. (Pricking shortbread is traditionally used to allow steam to escape and to encourage even baking, but I don't find this is necessary in cookies.)
Bake for about 12-14 minutes, maybe a little longer for thicker cookies. The cookies will still be pale and soft, but will firm up as they cool.
Cool for 2 minutes on the baking sheet, then cool completely on a rack.
Notes
These shortbread cookies will last a week at room temperature, and can be frozen for up to 3 months.
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although The View from Great Island attempts to provide accurate nutritional information, these figures are only estimates.
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