Black Sesame–Brown Sugar Shortbread

Preparation

1. Step 1

   Preheat oven to 325° with racks in center and upper third. Line 2 baking sheets with parchment paper.

   Step 2

   Beat butter and sugar until light and fluffy.

   Step 3

   Whisk together flour, cornstarch, salt, and sesame seeds. Add flour mixture to butter mixture, 1 cup at a time, beating after each addition until incorporated. Transfer mixture to a surface and knead into a smooth dough. Wrap in plastic and refrigerate for 20 minutes.

   Step 4

   Transfer chilled dough to a lightly floured surface; roll into a 1/2"-thick rectangle. Cut into 2" squares, then cut each square into triangles. Transfer to prepared baking sheets.

   Step 5

   Bake until edges are light golden brown, 20-22 minutes. Let cool.