Preheat the oven to 350 F. In a large bowl, mix the ground beef with the ranch seasoning mix. Press the mixture into a greased baking dish. Bake for 15-20 minutes.
Cut the tops of the rolls off and place the bottoms onto a large greased baking sheet. Evenly spread the mayonnaise onto the bread. Place the hamburger patty onto the rolls.
Top with cheese and the top of the rolls. Brush with melted butter. Bake for 10-15 minutes.