Cynthia's Rocky Road brownies

Why I Love This Recipe
My cousin Cynthia makes these decadent brownies that are so crazy rich. I think they are the first dessert that I could only eat half of! I didn't change much in keeping with the title of the richest dessert I have ever had, but cut back on some of the sweetness
Ingredients You'll Need
1 c butter
2 c sugar
1/2 c unsweetened cocoa powder
pinch salt
4 eggs, beaten
1 t vanilla
1 1/2 c flour
2 c pecans, chopped
Frosting
1/2 c butter, melted
1/3 c unsweetened cocoa powder
1 lb powdered sugar
1/2 c milk
4 c mini marshmallows
Directions
Grease and flour 9x12 baking pan
Melt 1 c butter, remove from heat
Stir together sugar, cocoa powder and salt
Add sugar mixture to melted butter
Stir in eggs and vanilla
Add flour and pecans, stirring until completely combined
Spread into baking pan
Cook at 350 degrees for 35 minutes or until toothpick comes out clean
Sprinkle marshmallows over hot cake
Let cake stand for 10 to 15 minutes, then spread frosting over
When cool, cut into squares
Frosting
In medium saucepan, melt ½ C butter over low heat
Stir in cocoa, then powdered sugar
Add milk and stir until smooth
Continue to add powdered sugar until frosting is thick enough to spread