chocolate-crumb pudding cake

1 chocolate cake mix

3/4 c chocolate chips

1 small box french vanilla instant pudding

1 c chocolate or caramel sauce

1 pkg whipped topping thawed

1/2 c chopped nuts

prepare cake according to instructions on the box.  add the chocolate chips to the batter.  bake in greased 9x13 pan.  allow cake to cool.  then crumble it.  make pudding according to package directions and allow to set in refrigerate 5 minutes.  then spread into bottom of 9x13 pan.  sprinkle half the cake crumbs over top of pudding and gently press into pudding.  drizzle 3/4 c of chocolate sauce over the crumbs.  add remaining cake crumbs, gently pressing into cake pan or bowl.  spread whipped topping over cake.  refrigerate until ready to serve.  just before serving, drizzle with remaining chocolate sauce and sprinkle with chopped nuts.