Ingredients
- 1 cup unsalted butter, softened
 - 1 3/4 cups powdered sugar, plus 1 1/2 cups for garnish
 - 1 large egg yolk
 - 1 tablespoon grated lemon zest
 - 1/3 cup fresh lemon juice
 - 1 teaspoon vanilla bean paste
 - 3 cups all-purpose flour
 - 1 teaspoon baking powder
 - 1 teaspoon kosher salt
 
Directions
- Preheat the oven to 350°F. Line 2 baking sheets with parchment paper.
 - In a stand mixer fitted with a paddle attachment, cream the butter and 1 3/4 cups powdered sugar starting on low speed and gradually increasing to medium-high speed for about 2 minutes. Turn off the mixer and scrape down the sides and bottom of the bowl with a spatula. On a low speed, slowly add the egg yolk, lemon zest, lemon juice, and vanilla bean paste, and mix until incorporated, about 2 minutes.
 - In a medium bowl, whisk together the flour, baking powder, and salt, then slowly add that to the lemon mixture. Mix on medium speed until just combined or until a dough forms, about 1 minute.
 - Use a 1 1/2-tablespoon scoop to portion the dough and place on the prepared baking sheets, spacing the scoops about 1 inch apart.
 - Bake until the cookies are still very blonde in color, but the bottoms are golden, about 15 minutes. Let the cookies cool on the baking sheets for 10 minutes.
 - Place the remaining 1 1/2 cups powdered sugar in a medium bowl. Roll the cookies in powdered sugar until completely coated, then let cool on a cooling rack for another 15 minutes.
 - Store leftovers in an airtight container, at room temperature, for up to 5 days.