Toffee Bars

1 cup butter
1 cup brown sugar
1 egg
1 t. vanilla
2 cups flour
1/2 t. salt
Cream butter and sugar, add egg and vanilla, add flour and salt. Spread into 9x13 pan Bake 350" 25 min. While
warm spread 1/2 lb. sweet choc. on top.
Sprinkle 1 Cup nuts on top. Cut warm.