Toffee Bars

1 cup packed brown sugar
1 cup butter or margarine softened
1 teaspoon vanilla
1 egg yolk
2 cups all-purpose flour
1/4 teaspoon salt
4 ounces milk chocolate broken into pieces
1/2 cup chopped nuts
Heat oven to 350. Beat brown sugar, butter, vanilla and egg yolk in large bowl with electric mixer on medium speed, or mix with spoon.
Stir in flour and salt. Press in ungreased rectangular pan, 13 9 2 inches. Bake 25 to
30 minutes or until very light brown (crust will be soft).
Immediately place milk chocolate pieces on baked crust. Let stand about 5 minutes or until softened; spread evenly. Sprinkle with nuts. Cool 30 minutes. Cut into 8 rows by 4 rows while warm.