Directions

1. Preheat oven to 350 degrees. Butter an 8-inch square baking pan. Cut a piece of parchment paper to fit in the bottom of the pan; place it in the pan, then butter the paper.
2. In a medium bowl, whisk together flour, baking powder, and salt. With an electric mixer, cream butter and sugars until light and fluffy. Add eggs and vanilla; beat until combined. Add flour mixture, and beat until just combined. Stir in dates and nuts.
3. Spread batter in prepared pan. Bake until golden brown on top and a toothpick inserted in the center comes out clean, 45 minutes to 1 hour. Cool completely on a wire rack. Run a knife around edges to loosen, then cut it into bars using a serrated knife. To cut the baked dough into 18 bars, make 3 cuts horizontally and 6 cuts vertically. Store the bars in an airtight container at room temperature up to a week.