National Lemon Bar Day

The bar cookie that figured out the perfect ratio of buttery crust to tart lemon curd.

National Lemon Bar Day on October 15 celebrates the lemon bar, a two-layer bar cookie with a shortbread crust topped with a firm lemon curd filling, dusted with powdered sugar. The lemon bar is believed to have originated in the United States in the mid-20th century, with the earliest known publishe