Mississippi Mud Bars

Ingredients: For the Bars 4 tablespoons (1/2 stick) unsalted butter 1/2 cup plus 1 tablespoon granulated sugar 1/4 cup plus 2 tablespoons unsweetened cocoa powder 1/4 teaspoon salt 1/2 teaspoon vanilla extract 1 large egg 1/4 cup all-purpose flour 1/4 cup chocolate chips 1 cup mini marshmallows For the Frosting 3 tablespoons unsalted butter, melted … Read more