Grapefruit Cookies

Makes 15 sandwich cookies Grated zest of 1 Ruby Red grapefruit, plus 1/4 cup freshly squeezed juice 1 cup sugar 1 1/2 cups all-purpose flour, plus more for work surface 3/4 cup cake flour (not self-rising) 1 teaspoon baking powder 1/2 teaspoon salt 1/2 cup (1 stick) unsalted butter, softened 2 large egg yolks Pink Grapefruit Cream Filling Directions Preheat oven to 350 degrees. Line a baking sheet with parchment paper; set aside. In a small bowl, combine zest with 1 tablespoon sugar; set aside. In a medium bowl, whisk together both flours, baking powder, and salt; set aside. In the bowl of an electric mixer fitted with the paddle attachment, beat butter and remaining sugar on medium-high speed until light and fluffy, about 2 minutes, scraping down sides of bowl as needed. Add egg yolks, and beat until combined, scraping down sides of bowl as needed. Beat in reserved zest-sugar mixture. Add flour mixture in two batches, alternating with the juice, and beat to combine. Turn out dough ont...