Almond Joy Sheet Cake

1 (18.25 ounce) box chocolate pudding cake mix

Filling:
1 cup undiluted Pet evaporated milk
1 cup granulated sugar
24 large marshmallows
14 ounces coconut

Frosting:
1 1/2 sticks (3/4 cup) butter or margarine
1/2 cup undiluted Pet evaporated milk
1 1/2 cups semisweet chocolate chips
1 cup nuts (optional)

Prepare cake mix as directed and bake.

Filling: Heat 1 cup milk, sugar, and marshmallows until melted; add coconut. While cake is hot, cover completely with filling. Let set while preparing frosting.

Frosting: In saucepan heat sugar, milk and butter until it starts to boil; add chocolate chips. Stir until melted; add nuts, if desired. Pour over cake.