Platinum Blondies

Position a rack in the center of the oven and preheat the oven to 325 degrees F. Lightly butter an 8-inch square baking pan with sides at least 1 1/2 inches high. Using an electric mixer or mixing by hand, beat together the sugar and egg until light and fluffy, about 3 minutes. Add the vanilla and butter and beat to mix well. In a small bowl, stir together the flour, baking soda, and salt and add to the butter mixture, beating until just incorporated. Do not overmix. Using a spoon, stir in the pecans and white chocolate. Spoon the batter into the prepared pan and use a flat metal spatula or a butter knife to smooth the top. Bake the blondies for 25 to 30 minutes, until the top is dry and golden and a knife inserted in the center comes out with just a few crumbs attached (not wet, but not perfectly dry). Remove the pan from the oven and place on a wire rack to cool. Cut the blondies into 2-inch squares. The blondies can be stored, well wrapped, at room temperature for up to 3 days (these seem to get better as they sit) or frozen for up to 2 months (thaw before serving).