Blender double fudge cake

1/4 c  Nuts
      1    Egg
      3 tb Shortening
      1 c  Milk
      3 oz Unsweetened chocolate;
           - Premelted envelopes
    1/2 ts vanilla
  1 1/4 c  flour
  1 1/3 c  Sugar
  1 1/4 ts baking powder
    1/2 ts Salt
    1/4 ts Soda
    1/2 c  Semisweet chocolate pieces
 
  Heat oven to 350~. Grease and flour baking pan,
  9x9x2". Measure nuts into blender; chop on low speed.
  Set nuts aside. In order listed, measure remaining
  ingredients except chocolate pieces into blender.
  Blend 30 seconds on high speed, stopping blender
  occasionally to scrape sides with rubber spatula.
  (Batter may be slightly lumpy). Pour batter into pan.
  Bake about 35 minutes or until wooden pick inserted in
  center comes out clean. Immediately sprinkle chocolate
  pieces over cake. Place baking sheet over pan so
  contained heat will soften chocolate pieces. Spread
  softened chocolate evenly over cake; sprinkle with
  reserved nuts. Serve warm.
   *To prepare cake with electric mixer, measure all
  ingredients except nuts and chocolate pieces into
  large mixer bowl. Blend 1/2 minute on low speed,
  scraping bowl constantly. Beat 3 minutes high speed,
  scraping bowl occasionally. Bake as directed.
   **If using self-rising flour, omit baking powder and
  salt.