Black Sesame–Brown Sugar Shortbread

Directions

1. 1.

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

2. 2.

   Beat butter and sugar until light and fluffy.

3. 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.

4. 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.

5. 5.

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