Ingredients
Method
- Preheat oven to 350°F (175°C). Line a 9x13-inch pan with parchment. Beat butter and sugar until light and fluffy, about 3 minutes.
- Add egg and vanilla, beat until smooth and glossy.
- Whisk flour, baking powder, and salt in a separate bowl. Gradually mix into wet ingredients until just combined.
- Press dough into pan in an even layer. Bake 18 to 22 minutes until pale golden and set.
- Cool completely in the pan, then lift out and cut into 24 squares.
Notes
These bars truly taste better the next day, so they are ideal for baking ahead. If you want a thicker slab, use an 8x8 pan and add 3 to 5 minutes to the bake time, watching for the same visual cues.
