easy cheesecake

bottom layer-

1 yellow cake mix

heat oven to 350.  grease bottom of 9 inch spring form pan.  prepare cake mix as directed on package.  pour half of the batter evenly into greased spring form pan.  bake 20 minutes

filling-

2 pkg cream cheese softened

1/2 c sugar

3/4 t vanilla

2 eggs

1/4 c sour cream

beat cream cheese, sugar, and vanilla with electric mixer until well blended. add eggs one at a time, mixing at low speed after each addition just until blended.  add sour cream; pour cream cheese mixture over cake. bake 35 minutes or until center is almost set.  run knife around rim of pan to separate cake from side of pan.

topping-

2 square unsweetened chocolate

3 T margarine

2 T boiling water

1 c powdered sugar

3/4 t vanilla

melt chocolate and margarine over low heat, stirring until smooth.  remove from heat. add water, sugar, and vanilla; mix well.  spread over cooled cheesecake.  refrigerate at least 4 hours or overnight