Preheat oven to 350°F. Lightly grease 8-inch square baking pan.
In small bowl, stir together flour, baking soda and salt; set aside.
In a large mixing bowl, combine brown sugar, egg and vanilla. Beat in melted butter. Gradually beat in flour mixture until blended. Stir in nuts.
Spread evenly into prepared pan. Bake 25-30 minutes or until toothpick inserted in center comes out clean. Cool in pan on wire rack.
Makes 16 squares.
Quick Tip
For chip lovers, try adding 1 cup of semi-sweet chocolate chips, butterscotch chips or peanut butter chips.