Coconut Pecan Frosting

This is my mom's recipe, and it is fabulous, there is nothing better than homemade coconut pecan frosting, especially on top of a german chocolate cake.

1 C. Evaporated Milk
3 Egg Yolks
1 tsp. Vanilla
1 C. Chopped Pecans
1 C. Sugar
1/2 C. Butter or Margarine
1 1/2 C. Coconut

Combine all ingredients except for coconut and nuts. Cook over medium heat until thickened, about 12 minutes. Add coconut and nuts, beat until thick enough to spread.