Baton Rouge Blondies

Source: Baton Rouge Advocate - 10/03/2002

1 cup plus 2 tablespoons all-purpose flour
1 teaspoon baking powder
1/4 teaspoon salt
3/4 cup packed light brown sugar
1/3 cup butter or margarine, softened
1/2 teaspoon vanilla extract
1 large egg
1 cup (6 ounces) Nestl