1cup(226 g or 2 sticks) unsalted butter, room temperature
⅔cup(80 g) confectioners' sugar, sifted
½teaspoonsalt
1teaspoonpure vanilla extract
2cups(250 g) all purpose flour
Instructions
In the bowl of a stand mixer (or using a hand mixer), beat butter on medium speed until light and fluffy, about 3 minutes. Add confectioners' sugar, salt and vanilla. Beat until well combined, about 1 minute, and scrape down the sides of the bowl if necessary. With the mixer on low, slowly add the flour. Mix until dough comes together in large clumps.
Place the dough on a silpat mat and shape into a rectangle 9 inches long and 3 inches wide.
Cover the dough with plastic wrap and chill for at least 1 hour and up to 48 hours.
Ten minutes before the dough is done chilling, preheat the oven to 350° F. Line a baking sheet with parchment paper and set aside.
Remove dough from the refrigerator and use a sharp knife or pastry cutter to cut the dough into 1/2-inch thick rectangles. Place cookies 1 inch apart on prepared baking sheet. Use a fork or toothpick to poke holes in the shortbread.
Bake cookies for 10 minutes. Let them cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Store in an airtight container at room temperature for up to a week.
Notes
Salted butter may be used, but keep in mind different brands of butter have different amounts of salt added. On average, about 1/4 teaspoon salt is in each 1/2 cup (1 stick).Sugar: Confectioners' sugar makes a softer crumb, more tender texture and smoother appearance. For a slightly crisper cookie, substitute with the same amount of caster sugar (superfine granulated sugar).Freeze dough for up to 3 months. After shaping the dough into a rectangle, wrap it securely in plastic wrap and freeze. Defrost in the refrigerator before cutting the cookie dough and baking.