8ounces(227 grams) unsalted butterroom temperature
1/2teaspoonkosher salt
1large(20 grams) egg yolk
2teaspoonslemon juice
12ounces(340 grams) unbleached all-purpose flour
Lemon Glaze (Optional)
1cup(120 grams) powdered sugarsifted
4-5teaspoonsfresh-squeezed lemon juice
Instructions
Make the Cookie Dough
Place the sugar in the bowl of an electric stand mixer. Zest the lemons directly onto the sugar, until there is about three (3) teaspoons of zest. Use your fingers to rub the zest into the sugar, until the sugar has a sandy texture.
Add the butter and salt to the lemon-sugar mixture. Mix on medium speed with the paddle attachment until the mixture is smooth and creamy, about 2 minutes.
Stop the mixer, scrape down the bowl, add the egg yolk and lemon juice and mix on medium speed just until the ingredients are incorporated.
Add all the flour and mix it on low speed just until all the flour is mixed in. The dough will be crumbly at this point. Increase the mixer speed to medium and mix until the dough has come together and forms large clumps.
Turn the cookie dough out onto a lightly floured surface. You can also turn it out onto a large piece of parchment paper or Silpat. Use your hands to shape the dough into a rectangle and lightly flour the top of the dough. Do not use too much flour, just enough to keep the rolling pin from sticking.
Roll the dough out to 1/4-inch thick. Use a 2-inch round cookie cutter to cut out the cookies. Place the cookies on a parchment-lined cookie sheet or board. Prick each cookie in the center with a fork. Pricking the cookies will ensure the steam releases as they bake and you'll end up with an even cookie.
Chill the dough in the refrigerator for at least 20 minutes. Chilling the dough will help the cookies hold their shape when baking.
Baking the Cookies
Preheat the oven to 300°F. Line a half baking sheet with parchment paper. Place the cookies on the baking sheet 1-1/2 inches apart.
Bake the cookies for 20-22 minutes. The bottom of the cookies will be lightly golden brown.
Take the cookies out of the oven and cool them for 5 minutes on the cookie sheet before moving them to a wire rack to completely cool. If you're using one baking sheet let it cool completely before baking the next batch of cookies.
At this point the cookies are ready to eat.
Storing the Cookies
Store the cookies in an airtight container for up to two weeks.
Lemon Glaze (Optional)
The cookies are delicious on their own but this lemon glaze amps up the lemon flavor makes a nice presentation if serving the cookies at a party.
Sift the powdered sugar into a medium-sized mixing bowl. Add 3 teaspoons of lemon juice and stir together. Add the remaining lemon juice 1/2 teaspoon at a time until the desired consistency is achieved.
Use an offset spatula or the back of a small spoon to spread the lemon glaze across the top of the cookie. Lay the cookies on a flat surface and let the glaze dry.
If serving the cookies right away and while the glaze is still wet make sure not to stack the cookies.
Notes
Weigh the Ingredients: It’s important to use a kitchen scale to weigh the ingredients to ensure these cookies come out right.Imperial Measurements: If you don’t have a scale to weigh ingredients, use the following measurements. To correctly measure the flour, spoon the flour into the measuring cup until it rises above the edge of the cup. Then use the straight edge of knife to level the flour. Do not tap the measuring cup.
Unbleached All-Purpose Flour - 2 3/4 cups (spoon and level, ~125 grams of flour per cup)
Unsalted Butter - 1 cup (16 tablespoons)
Granulated Sugar - 1/2 cup + 1 tablespoon
Kosher Salt: The cookies can be made without kosher salt, but I love my cookies to be a little salty.Unsalted Butter: Use butter that tastes great all by itself as that along with the lemon will be the most prominent flavor. Recommended brands are Tillamook Butter, Kerrygold Butter, and Challenge Butter.Freezing Unbaked Cookies: Unbaked lemon shortbread cookies can be frozen for up to 3 months. To freeze, place cut-out cookies on a parchment-lined baking sheet and freeze until firm (3 hours). Transfer to a freezer-safe container or zip-top bag, separating layers with parchment. Label with the date. Bake straight from frozen, adding about 2-5 minutes to the baking time.Freezing Baked Cookies: Baked cookies can be frozen for up to 2 months. Cool completely before freezing. Freeze the cookies on a parchment-lined baking sheet until firm (about 2 hours), then transfer to a freezer-safe container or bag with parchment between layers. Label with the date. Thaw at room temperature for 1 hour before serving.