Ingredients

2 3/4 cups all-purpose flour (spooned and leveled) 

1 tablespoon baking powder 

1/4 teaspoon fine salt 

1 cup (2 sticks) unsalted butter, room temperature 

1 1/2 cups granulated sugar 

2 tablespoons grated orange zest, plus 3 tablespoons juice (from 2 oranges) 

4 teaspoons lemon zest, plus 3 tablespoons juice (from 2 lemons) 

2 large eggs 

2 1/2 cups confectioners' sugar 

Preparation

Preheat oven to 350 degrees, with racks in upper and lower thirds. Whisk together flour, baking powder, and salt. In a large bowl, using an electric mixer, beat butter, granulated sugar, 1 tablespoon orange zest, and 2 teaspoons lemon zest on medium-high until pale and fluffy, 3 minutes, scraping down bowl as needed. Beat in eggs, one at a time. Add flour mixture; beat to combine.

Roll dough into 1-inch balls and place, 2 inches apart, on parchment-lined baking sheets. Bake until edges are lightly golden, 12 to 15 minutes, rotating sheets halfway through. Let cool on sheets on wire racks 5 minutes, then transfer cookies to racks and let cool completely.

Whisk together 1 tablespoon orange zest, 2 teaspoons lemon zest, citrus juices, and confectioners’ sugar until smooth. With a small spoon, spread glaze over each cookie. Let set 1 hour.