German Chocolate Cake

From: Carol...
1 yellow cake mix
1 small box of chocolate instant pudding
2 eggs
2 cups milk
Mix. Spray and flour two round dishes. Bake at 350 degrees for 30 minutes. Frost your bottom layer with chocolate frosting, top with half of the "topping" mixture. Place on the top layer, frost and top with the rest of the "topping" mixture.
Topping:
In a sauce pan mix together the following ingredients.  Bring to a boil and stir for about 10 minutes until it's thickened:
2 eggs yolk
1 cube of butter
1 cup evaporated milk
1 cup sugar
Remove from heat and add 1 cup of coconut and 1 cup of chopped nuts