Blondies

Preheat the oven to 350°F (175°C). Line an 8-inch (20-cm) square baking pan with an 8 x 11-inch (20 x 28-cm) piece of parchment paper, leaving a 2-inch (5-cm) overhang on two sides. You'll have to create seams in the corners and along the edges of the pan to get it to stay put (you can always add a few dots of butter underneath if necessary).

In a large bowl of an electric mixer, beat the melted butter with the brown sugar and granulated sugar until well combined, about 2 minutes. Beat in the egg and vanilla. On low speed, mix in the flour and salt until just blended. Stir in the chocolate chips and nuts. Transfer the batter to the prepared pan and spread evenly with a rubber spatula.

Bake for 25 to 30 minutes, until the top is set and lightly golden. Set the pan on a wire rack to cool. Using the parchment overhang, lift the blondie "cake" from the pan and transfer it to a cutting board; cut into 16 squares. Store the blondies in an airtight container at room temperature or freeze for longer storage.