decadent chocolate cake

How To Make decadent chocolate cake

• Step 1
  Preheat oven to 350 degrees.
• Step 2
  Grease a 10\" tube pan.
• Step 3
  Pour boiling water over chocolate and butter; let stand until melted.
• Step 4
  Stir in vanilla and sugar, then whisk in egg yolks, one at a time, until blended well.
• Step 5
  Mix soda and sour cream and whisk into chocolate mixture.
• Step 6
  Mix flour and baking powder well, and add to batter, mixing thoroughly.
• Step 7
  Beat egg whites until stiff but not dry.
• Step 8
  Stir in a quarter of the egg whites thoroughly into the batter.
• Step 9
  Scoop the remaining egg whites on top of the batter and gently fold in.
• Step 10
  Pour batter into prepared pan.
• Step 11
  Set on the middle rack of the oven and bake for 40-50 minutes or until the edges have pulled away from the pan and the cake tester inserted comes out clean.
• Step 12
  Cool in pan for 10 minutes; unmold and cool completely before frosting.
• Step 13
  For Chocolate Frosting: Place all ingredients in a heavy saucepan and whisk until smooth over low heat.
• Step 14
  Cool slightly; add more sugar if necessary.
• Step 15
  Spread on cake while frosting is still warm.
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