Mississippi Mud Cake

I am lucky to have inherited giant piles of handwritten recipes from my husband's great grandma. Here is one of our favorites!
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Mississippi Mud Cake

2 c sugar
1 c butter (no subs)
2 Tbsp cocoa powder
4 eggs, well beaten
1 tsp vanilla
1 1/2 c flour
1 1/3 c shredded coconut
1/4 tsp coconut extract
1 1/2 c chopped nuts (optional)
1- 7 oz jar marshmallow cream

Cream together sugar, butter and cocoa.  Add well beaten eggs and vanilla. Stir in flour and beat well. Add coconut flavoring and nuts, spread in greased 9×13 pan and bake at 350° for 30-40 minutes.  When done, immediately spread marshmallow cream on top and let cool completely.
When cool frost with the following::

1 lb. Powdered sugar
1/2 c butter
1/2 c evaporated milk
1/3 c cocoa
1 tsp vanilla

Mix all together until smooth.

Frost cake and cover with foil, refrigerate until served.