Mix the cake batter according to package directions. Stir in 3/4 cup chocolate chips. Bake the cake according to the package directions. Remove the cake from the oven and allow to cool slightly. Then poke holes all over the top with the end of a spoon or butter knife.
Next drizzle the sweetened condensed milk caramel over the cake. If it is too thick, warm in the microwave for 1 minute. Allow the topping to soak into the holes.
Once the cake is at room temperature, carefully top with the chocolate frosting. Then drizzle the caramel on top and add the chopped pecans.