Step 1

Preheat oven to 350 degrees and grease a 9x13 baking dish.

Step 2

For the brownies: In a large glass bowl, combine the unsweetened chocolate and butter. Heat in microwave 1-2 minutes stirring intermittently until melted and smooth.

Step 3

Beat in eggs, sugar, vanilla, and salt until well blended.

Step 4

Stir in flour, blending well.

Step 5

Spread evenly into prepared pan. Bake 25-30 minutes. Do not overbake! Brownies should be moist. Cool in pan.

Step 6

For topping: Combine chocolate chips and cream in a large glass bowl. Heat in microwave 1-2 minutes stirring twice until melted and smooth. Add butter and stir until melted and smooth. Fold in marshmallows.

Step 7

Spread topping evenly over the top of cooled brownies. Refrigerate several hours or overnight. Cut into bars. Store in the refrigerator.