Whisk flour, and salt in a bowl and set aside.
Using a standing or handheld mixer, cream the softened butter and sugar on medium until fully mixed together, about 45-60 seconds.
Scrape down the sides of the bowl and add the egg and vanilla.
Mix on low, increasing to medium until fully combined, about 30-60 seconds.
Add the flour mixture. Starting on low, mix for about 30 seconds, then increase to medium speed. Once the dough starts to clump in the middle it’s done. You should be able to press your finger into the dough and it will indent and not stick.
Divide your dough in half. If you’re saving you dough to bake at a later time, form two disks and wrap tightly in plastic. Store in an airtight container or ziploc bag in the fridge or freeze until ready to bake.
Chill in the fridge 1 hour.
At this time, preheat your oven to 350 degrees.
When ready to bake, remove from fridge and roll out each slab of dough to ¼ - ½ inch thick on floured parchment.
Cut out the cookies. If at any time the dough gets too soft, place back in the fridge or freezer for 10-15 minutes.
Place the cut out sugar cookies on a parchment or silicone mat lined baking sheet.
Optional: Rechill the cut-out cookies for 10-15 minutes in the fridge or freezer to further prevent spreading.
Depending on the size of the cookies, bake for 8-12 minutes.
Let cool 5 minutes on baking pan, then remove to a wire rack to finish cooling.
Re-roll the scraps of dough, repeating the process of cutting out the. cookies, chilling the dough, and baking, until all of the dough is gone.
Let the cookies cool completely before frosting. Enjoy!