Jump to Recipe Print Recipe Betty’s Sloppy Joes Betty Rudeen Also submitted by Karen Rademacher. Ingredients Instructions Ingredients 1 lb. hamburger browned1 onion diced2 tablespoons flour1 tablespoon mustard6 tablespoons catsup1 cup sour creamsalt and pepper Instructions Brown hamburger and onion. Add flour and mix in. Add mustard and catsup, mix in. Add sour cream and mix. Salt and pepper to taste.