Hazelnut Toffee Bars

Preheat oven to 350 degrees F. Using electric mixer, beat butter in a medium mixing bowl 30 seconds. Add the brown sugar and salt and beat until well blended. Beat in the milk and vanilla. Add flour and beat just until blended. Stir in half of the hazelnuts, pecans, or walnuts.

Spread batter in a buttered 13x9x2-inch baking pan. Bake until lightly browned around the edges, about 20 minutes.

Immediately place candy bars on top of the hot crust. Let stand until chocolate melts, about 3 minutes. Spread chocolate evenly over crust. Sprinkle remaining nuts over chocolate. Cool in pan on a rack. Cut into bars.