Mississippi Mud Cake (Boone Brownies)

Brandi Boone shared this recipe with me and it was called "Boone Brownies" , i knew I had tasted them before...it's a Mississippi Mud cake cut into squares :)

1 cup butter, melted
2 cups sugar
1/2 cup unsweetened cocoa
4 large eggs, lightly beaten
1 teaspoon vanilla extract
1/8 teaspoon salt
1 1/2 cups all-purpose flour
1 1/2 cups chopped pecans, coarsely chopped
1 (10.5 oz) bag of marshmallows
Frosting: 1/2 cup butter, softened 3-3/4 cups confectioners' sugar 3 tablespoons baking cocoa 1 tablespoon vanilla extract 4 to 5 tablespoons milk 1 cup chopped pecans

whisk together melted butter and next 5 ingredients in a large bowl. Stir in flour and pecans.
Pour batter into a greased and floured 15 x 10 inch jelly roll pan.

Bake at 350 for 20 to 25 min or until a wooden toothpick inserted in center comes out clean.
Remove from oven; top warm cake evenly with marshmallows. Return to oven, and bake 5 min.

For frosting: In a small bowl, cream butter and conf. sugar,until light and fluffy. Beat in cocoa, vanilla and enough milk to achieve frosting consistency. Fold in pecans. .
Drizzle the chocolate frosting over warm cake. i punch holes in cake before i do this.

allow to cool and store in refrigerator.