Preparation Steps

• Preheat your oven to 350°F (175°C). Grease a 9-inch square baking pan.
• In a large bowl, mix together melted butter and sugar until smooth.
• Beat in the eggs one at a time, then stir in the vanilla extract.
• Combine the cocoa, flour, and salt; gradually stir into the butter mixture until well blended.
• Spread the batter evenly into the prepared pan. Sprinkle the mini marshmallows over the top.
• Bake in preheated oven for 25 to 30 minutes. Allow to cool before cutting into squares.