Preheat oven to 350*. Spray a 9x13 baking dish with nonstick cooking spray.
In a medium bowl combine all the cake ingredients except for the chopped pecans. Don't forget to add the tub of coconut pecan frosting. That goes into the cake batter too!
Mix well. Stir in 1/2 cup chopped pecans. Pour batter into greased baking dish.
Bake for about 40 minutes.
For the Sauce: In a small pot over medium heat, melt 2 Tbsp. butter. Pour in can of sweetened condensed milk with the melted butter & str. Continue to stir until heated thoroughly. Add 1/2 cup chopped pecans. Stir again then take off heat. Pour sauce over cake.