Roast Beef with Coffee Gravy Makes 6 servings. 2 tablespoons butter 4 pounds chuck roast 1 tablespoon butter Salt to taste 1 onion, chopped 6 cups brewed coffee 2 cups canned mushrooms 3 tablespoons cornstarch Melt 2 tablespoons of butter in a large saucepan over medium high heat. Add the roast and sear on all sides until well browned; set aside. In the same saucepan, melt the remaining butter, add the salt and onions and sauté for 5 minutes. Return the meat to the saucepan and pour in the coffee and the mushrooms. Bring to a boil, reduce heat to low and simmer for 5 hours, turning meat over halfway through cooking time. To make gravy: Remove a cup of the coffee mixture from the saucepan, combine with the cornstarch, stirring until smooth, and return to the simmering pan. Mix well, remove from heat and serve.