Snack: Black and White Sesame Seed Cookies

Ingredients

3/4 teaspoon baking powder
3/4 teaspoon kosher salt
3 cups cake flour, plus more
1 1/4 cups (2 1/2 sticks) chilled unsalted butter, cut into pieces
1 cup granulated sugar
1 large egg
1 large egg yolk

Instructions

Whisk baking powder, salt, and 3 cups cake flour in a small bowl to combine. Using an electric mixer on high speed, beat butter and sugar in a medium bowl until well combined (butter does not need to be fluffy), about 3 minutes. Add egg and egg yolk and beat just to combine. Reduce speed to low and gradually mix in dry ingredients. Divide dough in half and form into 3/4"-thick disks. Wrap in plastic and chill until firm, about 2 hours.
Place racks in upper and lower thirds of oven and preheat to 325 °F. Let 1 disk of dough sit at room temperature until slightly softened, about 5 minutes.
Roll out dough on a lightly floured sheet of parchment paper, shifting often on sheet and dusting with more flour as needed to keep from sticking, until about 1/4" thick. Punch out rounds with cookie cutter and transfer to parchment-lined baking sheets, spacing 1 1/2" apart. Pat scraps into a 3/4"-thick disk. Chill 15 minutes.
Bake cookies, rotating baking sheets halfway through, until edges are golden brown, 12-15 minutes. Transfer cookies to wire racks and let cool. Cut out and bake scraps, then repeat process with remaining disk of dough.

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