Preparation Preheat oven to 350°F with rack in middle. Whisk together cornmeal, flour, and salt. Beat butter, sugar, and vanilla with an electric mixer at medium speed, scraping down side of bowl occasionally, until pale and fluffy, about 5 minutes. Beat in egg and yolk until combined well. Reduce speed to low and add cornmeal mixture in a slow stream, mixing until just combined. Form dough into a 5-inch square and chill, wrapped in plastic wrap, until firm, about 30 minutes. Roll out dough on a lightly floured surface with a lightly floured rolling pin into a 7-inch square (1/2 inch thick). Score dough in one direction with tines of a fork. Following scored marks, cut into 8 equal strips, then cut strips in half to form rectangles. Bake on an ungreased baking sheet until bottoms of cookies are pale golden, 15 to 18 minutes. Transfer to a rack to cool completely, about 1 hour. Cooks' note:Cookies can be made 1 day ahead and kept in an airtight container at room temperature.
Preparation Preheat oven to 350°F with rack in middle. Whisk together cornmeal, flour, and salt. Beat butter, sugar, and vanilla with an electric mixer at medium speed, scraping down side of bowl occasionally, until pale and fluffy, about 5 minutes. Beat in egg and yolk until combined well. Reduce speed to low and add cornmeal mixture in a slow stream, mixing until just combined. Form dough into a 5-inch square and chill, wrapped in plastic wrap, until firm, about 30 minutes. Roll out dough on a lightly floured surface with a lightly floured rolling pin into a 7-inch square (1/2 inch thick). Score dough in one direction with tines of a fork. Following scored marks, cut into 8 equal strips, then cut strips in half to form rectangles. Bake on an ungreased baking sheet until bottoms of cookies are pale golden, 15 to 18 minutes. Transfer to a rack to cool completely, about 1 hour. Cooks' note:Cookies can be made 1 day ahead and kept in an airtight container at room temperature.