Toffee Bars

Ingredients (8)

• 1 cup butter, softened
• 1 cup packed brown sugar
• 1 large egg yolk
• 1 teaspoon vanilla extract
• 2 cups all-purpose flour
• 1/4 teaspoon salt
• 6 milk chocolate candy bar (1.55 ounces each)
• 1/2 cup finely chopped pecans