Before starting, measure and prepare all of your ingredients. Sift the flour for best results. This will ensure the process runs smoothly and efficiently.I’m making a double portion here, so feel free to adjust if you’re making a smaller batch.
In a large mixing bowl, whisk together the sifted flour and salt until fully combined. Set the bowl aside.
In a medium bowl, whisk together the egg and vanilla extract until smooth and fully combined. Set aside.
In the bowl of your kitchen mixer, add the softened unsalted butter and granulated sugar. Using the paddle attachment, cream them together on medium speed for about 2-3 minutes, until the mixture becomes light and fluffy.
Scrape down the sides of the bowl with a silicone spatula, then add the egg and vanilla mixture. Continue mixing on medium speed until everything is fully incorporated and the mixture is smooth.
Gradually add the dry ingredients (flour and salt) to the wet mixture, about 1/3 at a time, mixing on low speed after each addition. Mix until a smooth dough forms.
Once the dough is fully mixed, divide it into two equal portions. Flatten each portion into a disk and wrap in food wrap.
Place the dough in the refrigerator to chill for at least one hour. This helps firm up the dough, making it easier to roll and cut, and you can also freeze dough disks for up to three months.