Place 4 squares of unsweetened chocolate and butter in a large microwavable bowl.
Cook on HIGH for 2 minutes or until butter is melted. Stir until chocolate is completely melted. Stir in sugar, eggs and vanilla. Stir in flour and nuts and mix until blended. Spread in a 13 X 9 X 2-inch baking pan lined with aluminum foil.
Bake at 325º F for 30 minutes or until toothpick inserted in center comes out clean. Do not over-bake. Cool in pan.
Spread half of jam over bars. Combine remaining unsweetened chocolate squares with sweetened chocolate squares in a bowl.
lace cream in a saucepan or in the microwave and bring to a simmering stage. Pour over chocolate and stir until smooth. Stir in jam. Spread chocolate mixture over jam layer.
