Ingredients

  • 1/2 cup butter, softened
  • 1/2 cup packed brown sugar
  • 1 large egg yolk
  • 1/2 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt
  • 1/4 teaspoon baking powder
  • 1 cup (6 ounces) semisweet chocolate chips
  • 1 tablespoon shortening
  • 1 cup finely chopped walnuts
  • 1/3 cup sweetened condensed milk
  • 1 teaspoon vanilla extract

Method

  • In a large bowl, cream butter and brown sugar until light and fluffy. Beat in egg yolk and vanilla. In a small bowl, whisk flour, salt and baking powder; gradually beat into creamed mixture.
  • Roll dough between two sheets of waxed paper into a 12x10-in. rectangle; transfer to a
  • . Refrigerate 30 minutes.
  • In a small microwave-safe bowl, melt chocolate chips and shortening; stir until smooth. Stir in walnuts, milk and vanilla. Remove top sheet of waxed paper; spread dough with filling. Using waxed paper to shape dough, roll up tightly jelly-roll style, starting with a long side. Wrap in plastic; refrigerate 2 hours or until firm.
  • Preheat oven to 375°. Unwrap and cut dough crosswise into 1/4-in. slices. Place 2 in. apart on greased
  • . Bake 7-9 minutes or until set. Cool 1 minute before removing from pans to wire racks.