In a small bowl, combine the chocolate chips, marshmallows and cashew nuts. Set aside.
In a large mixing bowl, combine melted butter, sugar, eggs and vanilla; beat with a spoon until well blended. Add the flour, cocoa, baking powder and salt; stir until well blended. Spread batter into a greased 9-inch baking pan.
Bake for 22 minutes. Sprinkle the chocolate chip mixture over the top and continue baking for another 5 minutes or until marshmallows have softened and puffed slightly.
Cool completely in pan on wire rack. Cut into squares using a wet knife.
Serve and enjoy!
Notes
Recipe adapted from www.hersheys.com
Recipe by Salu Salo Recipes at https://salu-salo.com/rocky-road-brownies/