Salty Lemon Shortbread

Instructions

Preheat the oven to 350°F. Line a 9x13 baking dish or two 9” cake pans with parchment paper. In a small bowl, combine one-third of the grated zest, 1⁄4 cup sugar and a good pinch of flaky salt. Use your fingers and rub the mixture together until the sugar is tinted yellow and smells deeply of lemon. Set aside. In a stand mixer fitted with the paddle attachment (or in a medium bowl with an electric hand mixer, or, bowl of a food processor), beat the butter, powdered sugar, the remaining 3⁄4 cup/165g granulated sugar, the remaining lemon zest, preserved lemon (if using), kosher salt and vanilla on medium-high till it’s super light and fluffy, 3 to 5 minutes. Using a spatula, scrape down the sides of the bowl and, with the mixer on low, slowly add the flour and beat just to blend. Pat the dough into the prepared pan, using your palm or the bottom of a measuring cup to flatten to the best of your ability. Using the tines of a fork, dot the top of the shortbread dough. Sprinkle the top with the lemon-rubbed sugar, pressing it into the raw dough. Bake until the top, bottom and edges are all nicely browned and the dough is set and firm to touch (but still slightly malleable), 30-35 minutes for the 9 × 13 pan, closer to 20-25 minutes for the 9-inch cake pans. 6 Let cool slightly before lifting up the parchment and removing the cookie from the pan. Using a knife, cut into 1 × 3-inch bars, or, if using round pans, 1-1 1⁄2-inch wedges. Let cool completely before eating them all (these are better at room temperature or even the next day, I promise). EAT WITH: a bunch of juicy grapes at a very lovely picnic. DO AHEAD: Cookie dough can be made 5 days ahead, tightly wrapped and refrigerated (or 1 month ahead, tightly wrapped and frozen). Cookies can be baked 5 days ahead, wrapped and stored at room temperature.

• Finely grated zest of 3 lemons
• 3⁄4 cup/165g plus 1⁄4 cup/55g granulated sugar
• Flaky sea salt
• 1⁄2 sticks/10 ounces/283g unsalted butter Notes: 2, cold, cut into 1” pieces
• cup/30g powdered sugar Notes: 1/4
• 1⁄2 preserved lemon Notes: optional, seeds removed, finely chopped

  Optional
• teaspoon/4g kosher salt Notes: 1
• teaspoon/5g vanilla extract Notes: 1
• 1⁄4 cups/325g all-purpose flour Notes: 2