Hillary's Marshmallow Brownies

These Brownie are one of my signature desserts. I consider the recipe my own since it is based on two separate recipes that I have brought together. They need to be made a day in advance to set up, but are so worth the wait. People who don't like things that are "too rich" or "too sweet" need not apply!

Brownie:
4oz unsweetened chocolate
1 c butter
4 large eggs
2 c sugar
1 c flour sifted

Preheat oven to 350. Melt chocolate and butter in microwave stirring every minute or so until melted. Add sugar, eggs and vanilla (make sure it's cooled enough to add the eggs) Add flour and stir to combine. Bake 20-25 min

Meanwhile make the frosting:
1/2 c butter very soft or melted
1/3 c milk
3 T cocoa
1 lb powdered sugar
1 t vanilla

With a couple minutes to go pour
1/2 bag mini marshmallows on top of brownie and place back in the oven long enough for brownies to puff/melt.

Promptly pour frosting over all and swirl with a knife until marbled and combined. Wait overnight and then cut and serve